A027257 a(n) = self-convolution of row n of array T given by A025177.

1, 2, 8, 58, 462, 3782, 31436, 264134, 2237640, 19079574, 163538472, 1407813438, 12163015662, 105407889930, 915913267652, 7976914859210, 69613332125342, 608590829593638, 5329041851925256, 46729591602635246, 410291878420535354, 3606612469259086834

Offset

0,2

Links

Table of n, a(n) for n=0..21.

Crossrefs

Cf. A025177.

Sequence in context: A191481 A229529 A007347 * A308352 A185898 A063074

Adjacent sequences: A027254 A027255 A027256 * A027258 A027259 A027260

Keyword

nonn

Author

Clark Kimberling

Extensions

a(1) corrected and more terms from Sean A. Irvine, Oct 26 2019

Status

approved