A155858 - OEIS

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A155858

Diagonal sums of triangle A155856.

1, 1, 3, 9, 35, 168, 967, 6538, 50831, 446919, 4383861, 47451921, 561715093, 7217604520, 100031995789, 1487319385140, 23613262336093, 398673670050021, 7132188802005991, 134766129577134553, 2681929390235577831 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	FORMULA	`G.f.: 1/(1-x^2-x/(1-x^2-x/(1-x^2-2x/(1-x^2-2x/(1-x^2-3x/(1-x^2-3x/(1-... (continued fraction);` `a(n)=sum{k=0..floor(n/2), C(2n-3k,k)*(n-2k)!}.`
	CROSSREFS	`Sequence in context: A034428 A101880 A107894 * A000834 A005346 A129094` `Adjacent sequences: A155855 A155856 A155857 * A155859 A155860 A155861`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jan 29 2009`

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Last modified February 17 09:14 EST 2012. Contains 206008 sequences.