id:A158459 - OEIS Search Results

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A simple periodic sequence .

+0
2

0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`A102370(n) modulo 4 .` `a(n)=1.5-0.5(-1)^n+sin(nPi/2)-cos(n*Pi/2) [From Richard Choulet (richardchoulet(AT)yahoo.fr), Apr 07 2009]`
	FORMULA	`G.f. : x(x^2+2x+3)/(1-x^4) .` `a(n)=(1/2)*{(n mod 4)+[(n+1) mod 4]+[(n+2) mod 4]-[(n+3) mod 4]}, with n>=0 [From Paolo P. Lava (ppl(AT)spl.at), Mar 30 2009]`
	CROSSREFS	`Sequence in context: A023445 A068494 A083721 this_sequence A031251 A128317 A084269` `Adjacent sequences: A158456 A158457 A158458 this_sequence A158460 A158461 A158462`
	KEYWORD	`nonn`
	AUTHOR	`Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Mar 19 2009`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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