id:A157335 - OEIS Search Results

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Expansion of 1/(1-6x-6x^2+x^3)

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1, 6, 42, 287, 1968, 13488, 92449, 633654, 4343130, 29768255, 204034656, 1398474336, 9585285697, 65698525542, 450304393098, 3086432226143, 21154721189904, 144996616103184, 993821591532385, 6811754524623510 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`a(n)=A152119(n+1)A152119(n+2).`
	FORMULA	`a(n)=sum{k=0..floor(n/2), (-1)^(n-k)U(k,7/2)} where U(n,x) is the nth-Chebyshev polynomial of the second kind;` `a(n)=sum{k=0..2n, F(n+1-floor(k/2))F(n+1-mod(k,2)-floor(k/2))*A152119(k+1)}.`
	CROSSREFS	`Sequence in context: A074429 A062310 A105482 this_sequence A057089 A110711 A156361` `Adjacent sequences: A157332 A157333 A157334 this_sequence A157336 A157337 A157338`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Feb 27 2009`

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

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