id:A071723 - OEIS Search Results

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Expansion of (1+x^2*C^2)*C^4, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.

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1, 4, 15, 54, 192, 682, 2431, 8710, 31382, 113696, 414086, 1515516, 5571750, 20569590, 76228095, 283481670, 1057628550, 3957577800, 14849601090, 55859886420, 210622646520, 795898303668, 3013646759910, 11432740177564 (list; graph; listen)

	OFFSET	`0,2`
	CROSSREFS	`Sequence in context: A090326 A006234 A094821 this_sequence A001559 A002311 A102349` `Adjacent sequences: A071720 A071721 A071722 this_sequence A071724 A071725 A071726`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Jun 06 2002`

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

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