id:A134751 - OEIS Search Results

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Hankel transform of expansion of (1/(1-x^2))c(x/(1-x^2)), where c(x) is the g.f. of A000108.

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1, 2, 8, 32, 256, 4096, 65536, 2097152, 134217728, 8589934592, 1099511627776, 281474976710656, 72057594037927936, 36893488147419103232, 37778931862957161709568, 38685626227668133590597632 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Hankel transform of A105864.`
	FORMULA	`a(n)=2^floor((n+1)^2/3); a(n)=Product{k=1..n, (5/3-2cos(2pi*k/3)/3)^(n-k+1)}; a(n)=Product{k=1..n, A130196(k)^(n-k+1)};`
	CROSSREFS	`Adjacent sequences: A134748 A134749 A134750 this_sequence A134752 A134753 A134754` `Sequence in context: A081358 A048855 A062797 this_sequence A139014 A063505 A085466`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Nov 08 2007`

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Last modified October 6 15:49 EDT 2008. Contains 144667 sequences.

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