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A105333 a(n) = n*(n+1)/2 mod 16. 0
0, 1, 3, 6, 10, 15, 5, 12, 4, 13, 7, 2, 14, 11, 9, 8, 8, 9, 11, 14, 2, 7, 13, 4, 12, 5, 15, 10, 6, 3, 1, 0, 0, 1, 3, 6, 10, 15, 5, 12, 4, 13, 7, 2, 14, 11, 9, 8, 8, 9, 11, 14, 2, 7, 13, 4, 12, 5, 15, 10, 6, 3, 1, 0, 0, 1, 3, 6, 10, 15, 5, 12, 4, 13, 7, 2, 14, 11, 9, 8, 8, 9, 11, 14, 2, 7, 13, 4, 12 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Triangular numbers mod 16. - Harvey P. Dale, Oct 12 2012

LINKS

Table of n, a(n) for n=0..88.

MATHEMATICA

Mod[#, 16]&/@Accumulate[Range[0, 90]] (* Harvey P. Dale, Oct 12 2012 *)

CROSSREFS

See A105198 for further information.

Sequence in context: A104619 A194037 A194101 * A126234 A259604 A130484

Adjacent sequences:  A105330 A105331 A105332 * A105334 A105335 A105336

KEYWORD

nonn

AUTHOR

Oscar Takeshita, May 01 2005

STATUS

approved

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Last modified September 20 02:20 EDT 2019. Contains 327207 sequences. (Running on oeis4.)