{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://askcalculators.com/calculator/number-sequence-calculator/schema.json",
  "title": "Number Sequence Calculator inputs",
  "description": "Find terms, partial sums, and a preview for arithmetic, geometric, or Fibonacci sequences.",
  "type": "object",
  "properties": {
    "sequenceType": {
      "title": "Sequence type",
      "type": "string",
      "default": "arithmetic",
      "enum": [
        "arithmetic",
        "geometric",
        "fibonacci"
      ],
      "x-optionLabels": {
        "arithmetic": "Arithmetic",
        "geometric": "Geometric",
        "fibonacci": "Fibonacci"
      }
    },
    "firstTerm": {
      "title": "First term",
      "type": "number",
      "default": 1,
      "x-step": 0.01
    },
    "commonValue": {
      "title": "Common difference or ratio",
      "type": "number",
      "description": "Ignored for Fibonacci sequences.",
      "default": 2,
      "x-step": 0.01
    },
    "termNumber": {
      "title": "Term number (n)",
      "type": "number",
      "default": 10,
      "minimum": 1,
      "maximum": 1000,
      "x-step": 1,
      "multipleOf": 1
    }
  },
  "required": [
    "sequenceType",
    "firstTerm",
    "commonValue",
    "termNumber"
  ],
  "additionalProperties": false,
  "x-askcalculators": {
    "version": "2.0.0",
    "calculatorUrl": "https://askcalculators.com/calculator/number-sequence-calculator/",
    "queryExample": "https://askcalculators.com/calculator/number-sequence-calculator/?sequenceType=arithmetic&firstTerm=1&commonValue=2&termNumber=10",
    "migrationStatus": "migrated",
    "reviewStatus": "pending",
    "pageStatus": "live",
    "workStatus": "pending",
    "migratedDate": "2026-08-25",
    "formula": {
      "expression": "Arithmetic: aₙ=a₁+(n−1)d; geometric: aₙ=a₁rⁿ⁻¹; Fibonacci: Fₙ=Fₙ₋₁+Fₙ₋₂."
    },
    "quality": {
      "availability": "live",
      "technicalReviewRecord": "/reviews/number-sequence-calculator.json",
      "qualifiedReview": "pending",
      "qualifiedReviewer": null,
      "qualifiedReviewDate": null,
      "formulaVersion": "2.0.0",
      "referenceCoverage": "references-listed",
      "releaseTestScope": "Catalog and regression checks are not a professional formula audit; consult release evidence.",
      "historicalMetadataDate": "2026-08-25",
      "historicalMetadataNotice": "The imported date is not evidence of a completed human review."
    },
    "outputs": {
      "nthTerm": {
        "title": "n-th term",
        "type": "string",
        "x-format": "text",
        "x-primary": true
      },
      "sum": {
        "title": "Sum through n",
        "type": "string",
        "x-format": "text"
      },
      "sequencePreview": {
        "title": "First terms",
        "type": "string",
        "x-format": "text"
      },
      "sequenceTypeLabel": {
        "title": "Sequence type",
        "type": "string",
        "x-format": "text"
      }
    }
  }
}