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A070438 n^2 mod 15. 10
0, 1, 4, 9, 1, 10, 6, 4, 4, 6, 10, 1, 9, 4, 1, 0, 1, 4, 9, 1, 10, 6, 4, 4, 6, 10, 1, 9, 4, 1, 0, 1, 4, 9, 1, 10, 6, 4, 4, 6, 10, 1, 9, 4, 1, 0, 1, 4, 9, 1, 10, 6, 4, 4, 6, 10, 1, 9, 4, 1, 0, 1, 4, 9, 1, 10, 6, 4, 4, 6, 10, 1, 9, 4, 1, 0, 1, 4, 9, 1, 10, 6, 4, 4, 6, 10, 1, 9, 4, 1, 0, 1, 4, 9, 1, 10, 6 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

COMMENTS

a(m*n)=a(m)*a(n) mod 15; a(15*n+7+k)=a(15*n+8-k) for k<=15*n+7; a(15*n+k)=a(15*n-k) for k<=15*n; a(n+15)=a(n). [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Apr 24 2009]

MATHEMATICA

Table[Mod[n^2, 15], {n, 0, 200}] (* From Vladimir Joseph Stephan Orlovsky, Apr 21 2011 *)

CROSSREFS

A010378, A070431, A008959, A070435, A070442, A070452, A159852, A000290. [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Apr 24 2009]

Sequence in context: A197266 A200393 * A070638 A152205 A129861 A055491

Adjacent sequences:  A070435 A070436 A070437 * A070439 A070440 A070441

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), May 12 2002

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Last modified February 15 10:06 EST 2012. Contains 205763 sequences.