A070571 - OEIS

A070571

a(n) = n^4 mod 28.

0, 1, 16, 25, 4, 9, 8, 21, 8, 9, 4, 25, 16, 1, 0, 1, 16, 25, 4, 9, 8, 21, 8, 9, 4, 25, 16, 1, 0, 1, 16, 25, 4, 9, 8, 21, 8, 9, 4, 25, 16, 1, 0, 1, 16, 25, 4, 9, 8, 21, 8, 9, 4, 25, 16, 1, 0, 1, 16, 25, 4, 9, 8, 21, 8, 9, 4, 25, 16, 1, 0, 1, 16, 25, 4, 9, 8, 21, 8, 9, 4, 25, 16, 1, 0, 1, 16, 25

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OFFSET

0,3

LINKS

Table of n, a(n) for n=0..87.

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

MATHEMATICA

Mod[Range[0, 90]^4, 28] (* Harvey P. Dale, Feb 04 2011 *)

PowerMod[Range[0, 90], 4, 28] (* or *) PadRight[{}, 90, {0, 1, 16, 25, 4, 9, 8, 21, 8, 9, 4, 25, 16, 1}] (* Harvey P. Dale, Aug 25 2025 *)

PROG

(SageMath) [power_mod(n, 4, 28)for n in range(0, 88)] # - Zerinvary Lajos, Oct 31 2009

(PARI) a(n)=n^4%28 \\ Charles R Greathouse IV, Apr 06 2016