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A086905 Sum_{k=0..n} (-1)^(n-k)*binomial(k,floor(k/2)). +0
3
1, 0, 2, 1, 5, 5, 15, 20, 50, 76, 176, 286, 638, 1078, 2354, 4081, 8789, 15521, 33099, 59279, 125477, 227239, 478193, 873885, 1830271, 3370029, 7030571, 13027729, 27088871, 50469889, 104647631, 195892564, 405187826, 761615284, 1571990936 (list; graph; listen)
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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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