id:A067307 - OEIS Search Results

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One-fourth of fourth column of triangle A067304.

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7, 71, 768, 8920, 109232, 1390800, 18237952, 244701440, 3343713024, 46374830848, 651170275328, 9238908291072, 132251092529152, 1907671386263552, 27701755840561152, 404632598092447744 (list; graph; listen)

	OFFSET	`0,1`
	FORMULA	`a(n)= A067304(n+3, 3)/4 = (A067297(n+3)-(b(n+3)+b(n+2)+4b(n+1)))/4, n>=0, with b(n) := A064340(n).` `G.f.: 4(3+10c(4x)+12c(4x)^2+3c(4x)^3)(c(4x)^3)/(1+c(4x))^4, with c(x) g.f. of A000108 (Catalan).`
	CROSSREFS	`Sequence in context: A100895 A065537 A048552 this_sequence A052390 A002119 A022518` `Adjacent sequences: A067304 A067305 A067306 this_sequence A067308 A067309 A067310`
	KEYWORD	`nonn,easy`
	AUTHOR	`Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de), Feb 5 2002`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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