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A005252 Sum_{k=0..floor(n/4)} binomial(n-2k,2k).
(Formerly M1048)
+0
8
1, 1, 1, 1, 2, 4, 7, 11, 17, 27, 44, 72, 117, 189, 305, 493, 798, 1292, 2091, 3383, 5473, 8855, 14328, 23184, 37513, 60697, 98209, 158905, 257114, 416020, 673135, 1089155, 1762289, 2851443, 4613732, 7465176, 12078909, 19544085, 31622993 (list; graph; listen)
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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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