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Search: id:A069955
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| A069955 |
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Let W(n)=Prod(k=1,n,1-1/4k^2), the partial Wallis product ( lim n -> infinity W(n)=2/Pi ); then a(n)=numerator(W(n)). |
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3
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| 1, 3, 45, 175, 11025, 43659, 693693, 2760615, 703956825, 2807136475, 44801898141, 178837328943, 11425718238025, 45635265151875, 729232910488125, 2913690606794775, 2980705490751054825
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