id:A158196 - OEIS Search Results

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Expansion of (1-x^2*c(x)^4)/(1-3*x*c(x)^2), c(x) the g.f. of A000108.

+0
2

1, 3, 14, 71, 370, 1950, 10332, 54895, 292106, 1555706, 8289732, 44186710, 235575028, 1256093084, 6698073528, 35719158591, 190488112122, 1015885525794, 5417869631028, 28894620083346, 154102115782812 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Apply the inverse of the Riordan array (1/(1-x^2),x/(1+x)^2) to 3^n. Hankel transform is A001653.`
	CROSSREFS	`Cf. A090317.` `Sequence in context: A009020 A109792 A137177 this_sequence A009637 A098648 A026295` `Adjacent sequences: A158193 A158194 A158195 this_sequence A158197 A158198 A158199`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Mar 13 2009`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

AT&T Labs Research