A022001 - OEIS

A022001

Decimal expansion of 1/997.

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

(list; constant; graph; refs; listen; history; text; internal format)

OFFSET

0,6

COMMENTS

Generalization:

1/7 = sum (3^i/10^(i+1)), i >= 0,

1/97 = sum (3^i/100^(i+1)), i >= 0,

1/997 = sum (3^i/1000^(i+1)), i >= 0, (this sequence)

1/9997 = sum (3^i/10000^(i+1)), i >= 0, ... - Daniel Forgues, Oct 28 2011

Periodic with period length 166. - Ray Chandler, Jan 09 2025

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, 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, 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, 1).

MATHEMATICA

Join[{0, 0}, RealDigits[1/997, 10, 120][[1]]] (* Harvey P. Dale, Jul 28 2023 *)

PROG

(PARI) 1/997. \\ Charles R Greathouse IV, Apr 02 2014

CROSSREFS

Sequence in context: A068606 A106153 A166244 * A265832 A343236 A363767

Adjacent sequences: A021998 A021999 A022000 * A022002 A022003 A022004

KEYWORD

nonn,cons,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved