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A070538 a(n) = n^4 mod 19. 1
0, 1, 16, 5, 9, 17, 4, 7, 11, 6, 6, 11, 7, 4, 17, 9, 5, 16, 1, 0, 1, 16, 5, 9, 17, 4, 7, 11, 6, 6, 11, 7, 4, 17, 9, 5, 16, 1, 0, 1, 16, 5, 9, 17, 4, 7, 11, 6, 6, 11, 7, 4, 17, 9, 5, 16, 1, 0, 1, 16, 5, 9, 17, 4, 7, 11, 6, 6, 11, 7, 4, 17, 9, 5, 16, 1, 0, 1, 16, 5, 9, 17, 4, 7, 11, 6, 6, 11, 7, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Equivalently: n^(18*m + 4) mod 19. - G. C. Greubel, Apr 05 2016

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..1000

FORMULA

From G. C. Greubel, Apr 05 2016: (Start)

a(19*n) = 0.

a(n+19) = a(n). (End)

MATHEMATICA

PowerMod[Range[0, 100], 4, 19] (* G. C. Greubel, Apr 05 2016 *)

PROG

(Sage) [power_mod(n, 4, 19)for n in range(0, 90)] # Zerinvary Lajos, Oct 31 2009

(PARI) a(n)=n^4%19 \\ Charles R Greathouse IV, Apr 06 2016

CROSSREFS

Sequence in context: A102411 A336782 A040245 * A296336 A198064 A233000

Adjacent sequences:  A070535 A070536 A070537 * A070539 A070540 A070541

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, May 13 2002

STATUS

approved

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Last modified August 12 23:52 EDT 2022. Contains 356077 sequences. (Running on oeis4.)