A021645 Decimal expansion of 1/641.

0, 0, 1, 5, 6, 0, 0, 6, 2, 4, 0, 2, 4, 9, 6, 0, 9, 9, 8, 4, 3, 9, 9, 3, 7, 5, 9, 7, 5, 0, 3, 9, 0, 0, 1, 5, 6, 0, 0, 6, 2, 4, 0, 2, 4, 9, 6, 0, 9, 9, 8, 4, 3, 9, 9, 3, 7, 5, 9, 7, 5, 0, 3, 9, 0, 0, 1, 5, 6, 0, 0, 6, 2, 4, 0, 2, 4, 9, 6, 0, 9, 9, 8, 4, 3, 9, 9, 3, 7, 5, 9, 7, 5, 0, 3, 9, 0, 0, 1

Offset

0,4

Links

Table of n, a(n) for n=0..98.

Index entries for linear recurrences with constant coefficients, signature (1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-1,1).

Example

0.0015600624024960998439937597503900156006240249609984...

Mathematica

First[RealDigits[1/641, 10, 100, -1]] (* Paolo Xausa, Aug 24 2025 *)

Crossrefs

Sequence in context: A078473 A215833 A110800 * A201591 A100220 A011440

Adjacent sequences: A021642 A021643 A021644 * A021646 A021647 A021648

Keyword

nonn,cons,easy

Author

N. J. A. Sloane

Status

approved