A138272 Column 0 of triangle A138271; also, column 3 of A138271 shift left; also, column 0 of matrix power A138271^4 shift right.

1, 1, 4, 28, 268, 3164, 43672, 682632, 11834536, 224283416, 4597330748, 101100605540, 2370095338372, 58924635472260, 1546999678599872, 42734731811302304, 1238309697485975648, 37538075865014728096

Offset

0,3

Links

Table of n, a(n) for n=0..17.

Crossrefs

Cf. A138271; A138273, A138274; A138275.

Sequence in context: A353013 A284756 A316144 * A367470 A361049 A372747

Adjacent sequences: A138269 A138270 A138271 * A138273 A138274 A138275

Keyword

nonn

Author

Paul D. Hanna, Mar 11 2008

Status

approved