A021643 Decimal expansion of 1/639.

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

Offset

0,4

Links

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

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

Example

0.00156494522691705790297339593114241001564945226917...

Maple

Digits:=100: evalf(1/639); # Wesley Ivan Hurt, Jan 16 2017

Mathematica

First[RealDigits[1/639, 10, 100, -1]] (* Paolo Xausa, Aug 24 2025 *)

Crossrefs

Sequence in context: A351217 A343063 A132324 * A021181 A082220 A144522

Adjacent sequences: A021640 A021641 A021642 * A021644 A021645 A021646

Keyword

nonn,cons,easy

Author

N. J. A. Sloane

Status

approved