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Search: id:A128147
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| A128147 |
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Denominators of Hankel transform of 1/J(n+1), where J(n)=A001045(n). |
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+0
2
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| 1, 3, 7425, 47324536875, 25638858602403023525625, 12884448481414473203775367576406984041875, 115708032002378912987246508786002888051981871843289603877158640625
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Numerators are A128146.
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FORMULA
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a(n)=Product_{k=1..2n-1} J(n)^(n-abs(k-n))}/Product_{k=1..n} Product_{i=1..k-1} J(i)}}^2; a(n)=J(n)^n*product{k=1..n-1, J(n-k)^(n-k)*J(n+k)^(n-k)}/product{k=0..n-1,product{i=1..k, J(i)}^2};
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CROSSREFS
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Sequence in context: A056749 A134776 A062595 this_sequence A068918 A158036 A055379
Adjacent sequences: A128144 A128145 A128146 this_sequence A128148 A128149 A128150
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KEYWORD
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easy,nonn,frac
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AUTHOR
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Paul Barry (pbarry(AT)wit.ie), Feb 16 2007
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