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1, 1, 1, 3, 4, 5, 15, 21, 28, 84, 120, 165, 495, 715, 1001, 3003, 4368, 6188, 18564, 27132, 38760, 116280, 170544, 245157, 735471, 1081575, 1562275, 4686825, 6906900, 10015005, 30045015, 44352165, 64512240, 193536720, 286097760
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,4
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LINKS
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Table of n, a(n) for n=0..34.
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MAPLE
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[seq(binomial(n, floor(n/3)), n=0..50)];
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MATHEMATICA
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a[n_] := Binomial[n, Floor[n/3]]; Array[a, 50, 0] (* Enrique Pérez Herrero, Mar 06 2012 *)
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CROSSREFS
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Cf. A001405, A051036, A051052. A051053.
Cf. A047193.
Sequence in context: A221173 A051530 A048040 * A031199 A173027 A173061
Adjacent sequences: A051030 A051031 A051032 * A051034 A051035 A051036
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane.
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STATUS
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approved
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