id:A083229 - OEIS Search Results

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(3*3^n+(-5)^n)/4.

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1, 1, 13, -11, 217, -599, 4453, -17891, 102577, -473519, 2485693, -12074171, 61433737, -303980039, 1529466133, -7618632851, 38179257697, -190638008159, 953964881773, -4767499885931, 23844472998457, -119201444285879, 596069983548613, -2980161631385411 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`a(n)=(3*3^n+(-5)^n)/4 G.f. (1+3x)/((1-3x)(1+5x)) E.g.f. (3exp(3x)+exp(-5x))/4`
	CROSSREFS	`Sequence in context: A152298 A158956 A160130 this_sequence A140554 A002591 A037055` `Adjacent sequences: A083226 A083227 A083228 this_sequence A083230 A083231 A083232`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Apr 23 2003`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

AT&T Labs Research