A070583 a(n) = n^4 mod 40.

0, 1, 16, 1, 16, 25, 16, 1, 16, 1, 0, 1, 16, 1, 16, 25, 16, 1, 16, 1, 0, 1, 16, 1, 16, 25, 16, 1, 16, 1, 0, 1, 16, 1, 16, 25, 16, 1, 16, 1, 0, 1, 16, 1, 16, 25, 16, 1, 16, 1, 0, 1, 16, 1, 16, 25, 16, 1, 16, 1, 0, 1, 16, 1, 16, 25, 16, 1, 16, 1, 0, 1, 16, 1, 16, 25, 16, 1, 16, 1, 0, 1, 16, 1

Offset

0,3

Links

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

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

Mathematica

PowerMod[Range[0, 90], 4, 40] (* Harvey P. Dale, Nov 28 2012 *)

Prog

(PARI) a(n)=n^4%40 \\ Charles R Greathouse IV, Apr 06 2016

Crossrefs

Sequence in context: A303327 A070539 A301909 * A133821 A002651 A097522

Adjacent sequences: A070580 A070581 A070582 * A070584 A070585 A070586

Keyword

nonn,easy

Author

N. J. A. Sloane, May 13 2002

Status

approved