id:A115151 - OEIS Search Results

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Fourth diagonal (M=4) sequence of triangle A113647, called Y(2,1).

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1, 31, 289, 2271, 16929, 123871, 901153, 6553567, 47759393, 349143007, 2561474593, 18860670943, 139371085857, 1033405464543, 7687240679457, 57356977176543, 429173772386337, 3219806849335263, 24215844242325537 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n)= A113647(n+3, n+1), n>=0.` `G.f.: ((-2 + 8x +x^3) + 2(1-6x+4x^2)c(2x))/((x^3)(1+x)), with the o.g.f. c(x):=(1-sqrt(1-4x))/(2*x) of A000108 (Catalan numbers).`
	CROSSREFS	`Sequence in context: A008386 A161558 A156094 this_sequence A001298 A027841 A000500` `Adjacent sequences: A115148 A115149 A115150 this_sequence A115152 A115153 A115154`
	KEYWORD	`nonn,easy`
	AUTHOR	`Wolfdieter Lang (wolfdieter.lang_AT_physik_DOT_uni-karlsruhe_DOT_de), Jan 13 2006`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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