A027301 a(n) = self-convolution of row n of Catalan triangle (A008315).

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

Links

Table of n, a(n) for n=0..26.

Crossrefs

Sequence in context: A163986 A189583 A153936 * A153933 A128601 A034500

Adjacent sequences: A027298 A027299 A027300 * A027302 A027303 A027304

Keyword

nonn

Author

Clark Kimberling

Status

approved