A082306 - OEIS

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A082306

Expansion of (1+x)exp(2x)cosh(x).

1, 3, 9, 29, 97, 327, 1097, 3649, 12033, 39371, 127945, 413349, 1328609, 4251535, 13551753, 43046729, 136314625, 430467219, 1355971721, 4261625389, 13366006881, 41841412823, 130754415049, 407953774929, 1270932914177 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	COMMENTS	`Binomial transform of A082305 a(n)=(A006234(n)+A000027(n))/2`
	FORMULA	`a(n)=(n+1+3^(n-1)(n + 3))/2 G.f.: (1/(1-x)^2+(1-2x)/(1-3x)^2)/2 E.g.f. (1+x)exp(2x)cosh(x)`
	CROSSREFS	`Cf. A082307.` `Sequence in context: A071732 A071736 A148938 * A124431 A071740 A081696` `Adjacent sequences: A082303 A082304 A082305 * A082307 A082308 A082309`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Apr 09 2003`

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Last modified February 13 13:22 EST 2012. Contains 205483 sequences.