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Search: id:A005251
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A005251 a(0) = 0, a(1) = a(2) = a(3) = 1; thereafter, a(n) = a(n-1)+a(n-2)+a(n-4).
(Formerly M1059)
+0
22
0, 1, 1, 1, 2, 4, 7, 12, 21, 37, 65, 114, 200, 351, 616, 1081, 1897, 3329, 5842, 10252, 17991, 31572, 55405, 97229, 170625, 299426, 525456, 922111, 1618192, 2839729, 4983377, 8745217, 15346786, 26931732, 47261895, 82938844, 145547525 (list; graph; listen)
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Last modified December 5 23:38 EST 2009. Contains 170428 sequences.


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