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A070450 a(n) = n^2 mod 28. 7
0, 1, 4, 9, 16, 25, 8, 21, 8, 25, 16, 9, 4, 1, 0, 1, 4, 9, 16, 25, 8, 21, 8, 25, 16, 9, 4, 1, 0, 1, 4, 9, 16, 25, 8, 21, 8, 25, 16, 9, 4, 1, 0, 1, 4, 9, 16, 25, 8, 21, 8, 25, 16, 9, 4, 1, 0, 1, 4, 9, 16, 25, 8, 21, 8, 25, 16, 9, 4, 1, 0, 1, 4, 9, 16, 25, 8, 21, 8, 25, 16, 9, 4, 1, 0, 1, 4, 9, 16 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

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

FORMULA

a(n) = a(n-28). - G. C. Greubel, Mar 24 2016

MATHEMATICA

Table[Mod[n^2, 28], {n, 0, 200}] (* Vladimir Joseph Stephan Orlovsky, Apr 27 2011 *)

PROG

(PARI) a(n)=n^2%28 \\ Charles R Greathouse IV, Apr 06 2016

CROSSREFS

Cf. A070448, A070449.

Sequence in context: A070452 A070653 A070451 * A070449 A070448 A081403

Adjacent sequences:  A070447 A070448 A070449 * A070451 A070452 A070453

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, May 12 2002

STATUS

approved

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Last modified April 30 20:00 EDT 2016. Contains 272242 sequences.