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A070568 n^4 mod 25. 0
0, 1, 16, 6, 6, 0, 21, 1, 21, 11, 0, 16, 11, 11, 16, 0, 11, 21, 1, 21, 0, 6, 6, 16, 1, 0, 1, 16, 6, 6, 0, 21, 1, 21, 11, 0, 16, 11, 11, 16, 0, 11, 21, 1, 21, 0, 6, 6, 16, 1, 0, 1, 16, 6, 6, 0, 21, 1, 21, 11, 0, 16, 11, 11, 16, 0, 11, 21, 1, 21, 0, 6, 6, 16, 1, 0, 1, 16, 6, 6, 0, 21, 1, 21 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Periodic with period length equal to 25. - Harvey P. Dale, May 11 2020

LINKS

Table of n, a(n) for n=0..83.

MATHEMATICA

PowerMod[Range[0, 90], 4, 25] (* or *) PadRight[{}, 120, {0, 1, 16, 6, 6, 0, 21, 1, 21, 11, 0, 16, 11, 11, 16, 0, 11, 21, 1, 21, 0, 6, 6, 16, 1}] (* Harvey P. Dale, May 11 2020 *)

PROG

(Sage) [power_mod(n, 4, 25)for n in range(0, 84)] # - Zerinvary Lajos, Oct 31 2009

(PARI) a(n)=n^4%25 \\ Charles R Greathouse IV, Apr 06 2016

CROSSREFS

Sequence in context: A040244 A084527 A084517 * A161884 A166210 A141078

Adjacent sequences:  A070565 A070566 A070567 * A070569 A070570 A070571

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, May 13 2002

STATUS

approved

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Last modified September 25 21:49 EDT 2022. Contains 356986 sequences. (Running on oeis4.)