id:A067306 - OEIS Search Results

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One-fourth of third column of triangle A067304.

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1, 8, 75, 796, 9176, 111936, 1421968, 18618560, 249542400, 3407171584, 47226230528, 662805371904, 9400304896000, 134517761982464, 1939837469085696, 28162286932246528, 411276783645753344 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n)= A067304(n+2, 2)/4 = (A067297(n+2) - (A064340(n+2)+A064340(n+1)))/4, n>=0.` `G.f.: (3+10c(4x)+3c(4x)^2)(c(4x)^3)/(1+c(4x))^4, with c(x) g.f. of A000108 (Catalan).`
	CROSSREFS	`Sequence in context: A015578 A145600 A094735 this_sequence A071720 A111685 A088376` `Adjacent sequences: A067303 A067304 A067305 this_sequence A067307 A067308 A067309`
	KEYWORD	`nonn,easy`
	AUTHOR	`Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de), Feb 5 2002`

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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