A105332 - OEIS

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A105332

a(n) = n*(n+1)/2 mod 8.

0, 1, 3, 6, 2, 7, 5, 4, 4, 5, 7, 2, 6, 3, 1, 0, 0, 1, 3, 6, 2, 7, 5, 4, 4, 5, 7, 2, 6, 3, 1, 0, 0, 1, 3, 6, 2, 7, 5, 4, 4, 5, 7, 2, 6, 3, 1, 0, 0, 1, 3, 6, 2, 7, 5, 4, 4, 5, 7, 2, 6, 3, 1, 0, 0, 1, 3, 6, 2, 7, 5, 4, 4, 5, 7, 2, 6, 3, 1, 0, 0, 1, 3, 6, 2, 7, 5, 4, 4, 5, 7, 2, 6, 3, 1, 0, 0, 1, 3, 6, 2, 7, 5, 4, 4

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OFFSET

0,3

LINKS

Table of n, a(n) for n=0..104.

Index entries for linear recurrences with constant coefficients, signature (1,-1,1,-1,1,-1,1,-1,1,-1,1,-1,1,-1,1).

MATHEMATICA

Mod[Accumulate[Range[0, 110]], 8] (* Harvey P. Dale, Nov 03 2013 *)

CROSSREFS

Cf. A000217.

See A105198 for further information.

Sequence in context: A046901 A306640 A169751 * A274632 A186706 A169749

Adjacent sequences: A105329 A105330 A105331 * A105333 A105334 A105335

KEYWORD

nonn,easy

AUTHOR

Oscar Takeshita, May 01 2005

STATUS

approved