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A027301
a(n) = self-convolution of row n of Catalan triangle (A008315).
0
1, 2, 4, 13, 26, 100, 196, 820, 1581, 6954, 13244, 60214, 113620, 528840, 990756, 4692780, 8741876, 41970280, 77824912, 377687453, 697689538, 3415756084, 6289798684, 31018849628, 56964451670, 282658474700, 517885177320
OFFSET
0,2
CROSSREFS
Sequence in context: A163986 A189583 A153936 * A153933 A128601 A034500
KEYWORD
nonn
STATUS
approved