login
A070458
a(n) = n^2 mod 36.
2
0, 1, 4, 9, 16, 25, 0, 13, 28, 9, 28, 13, 0, 25, 16, 9, 4, 1, 0, 1, 4, 9, 16, 25, 0, 13, 28, 9, 28, 13, 0, 25, 16, 9, 4, 1, 0, 1, 4, 9, 16, 25, 0, 13, 28, 9, 28, 13, 0, 25, 16, 9, 4, 1, 0, 1, 4, 9, 16, 25, 0, 13, 28, 9, 28, 13, 0, 25, 16, 9, 4, 1, 0, 1, 4, 9, 16, 25, 0, 13, 28, 9, 28, 13, 0
OFFSET
0,3
LINKS
Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1).
FORMULA
a(n) = a(n-18). - G. C. Greubel, Mar 25 2016
MATHEMATICA
Table[Mod[n^2, 36], {n, 0, 200}] (* Vladimir Joseph Stephan Orlovsky, Apr 27 2011 *)
PowerMod[Range[0, 90], 2, 36] (* Harvey P. Dale, Jan 02 2016 *)
PROG
(PARI) a(n)=n^2%36 \\ Charles R Greathouse IV, Apr 06 2016
CROSSREFS
Sequence in context: A033611 A033615 A122373 * A070457 A070456 A070455
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, May 12 2002
STATUS
approved