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Search: id:A072331
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| A072331 |
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a(n) = 2^(n-1)*sum(k=0,n,(n+k)!/(n-k)!/k!). |
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1
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| 3, 38, 772, 21768, 786736, 34703456, 1807726656, 108602413184, 7392195003136, 562241229891072, 47257832090862592, 4349969517278922752, 435185983056255725568, 47017486048144734052352
(list; graph; listen)
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