A105333 a(n) = n*(n+1)/2 mod 16.

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

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