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Search: id:A030033
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A030033 a(n+1) = Sum a(k)a(n-k), k = 0 ... [ 2n/3 ]. +0
1
1, 1, 1, 2, 4, 7, 15, 34, 72, 165, 387, 861, 2039, 4894, 11256, 27085, 66021, 156347, 381720, 940211, 2261208, 5578659, 13846756, 33654950, 83539418, 208608556, 512069441, 1278522424, 3207377196, 7925966000 (list; graph; listen)
OFFSET

0,4
CROSSREFS

Cf. A000992.

Sequence in context: A129682 A129981 A072964 this_sequence A135131 A032363 A026731

Adjacent sequences: A030030 A030031 A030032 this_sequence A030034 A030035 A030036

KEYWORD

nonn

AUTHOR

njas

page 1

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Last modified July 19 08:04 EDT 2008. Contains 142098 sequences.

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