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A024965
a(n) = Sum(a(2i-1)*a(n-2i+1), i = 1,2,...,[ (n+2)/4 ]).
0
1, 1, 1, 1, 1, 2, 3, 4, 6, 10, 16, 25, 39, 70, 117, 190, 315, 555, 950, 1595, 2700, 4806, 8346, 14267, 24593, 43772, 76730, 133072, 231389, 415124, 733000, 1282079, 2251229, 4042577, 7178774, 12651682, 22341634, 40275260, 71841139, 127279299
OFFSET
4,6
CROSSREFS
Sequence in context: A104767 A072944 A024722 * A018142 A173697 A017986
KEYWORD
nonn
STATUS
approved