API reference › @evolu/common › Number › fibonacciAt

function fibonacciAt(
  index: number &
    Brand<"NonNaN"> &
    Brand<"Finite"> &
    Brand<"Int"> &
    Brand<"NonNegative"> &
    Brand<"Positive"> &
    Brand<"LessThanOrEqualTo78"> &
    Brand<"FibonacciIndex">,
): number &
  Brand<"NonNaN"> &
  Brand<"Finite"> &
  Brand<"Int"> &
  Brand<"NonNegative"> &
  Brand<"Positive">;

Defined in: packages/common/src/Number.ts:240

Returns the Fibonacci number at the given index (1-indexed: 1,1,2,3,5,8,...).

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