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A091804
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a(n) = 2^(n*(n+1)/2)*A055209(n).
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3
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OFFSET
| 0,2
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COMMENTS
| This sequence is the Hankel transform (see A001906 for definition) of A000629, A000670 (Fubini numbers) and A052841.
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FORMULA
| a(n)=Product{k=0..n, (2(k+1)*floor((2k+3)/2))^(n-k)}. [From Paul Barry (pbarry(AT)wit.ie), Mar 30 2010]
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MATHEMATICA
| Table[Product[(2(k+1)Floor[(2k+3)/2])^(n-k), {k, 0, n}], {n, 0, 10}] (* From Harvey P. Dale, Aug 10 2011 *)
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CROSSREFS
| Cf. A000629 A000670 A001906 A052841 A055209.
Sequence in context: A202629 A129349 A180127 * A012853 A185995 A128146
Adjacent sequences: A091801 A091802 A091803 * A091805 A091806 A091807
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KEYWORD
| nonn
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AUTHOR
| DELEHAM Philippe (kolotoko(AT)wanadoo.fr), Mar 07 2004
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