A152404 Column 1 of matrix square of triangle A152400; also, column 3 of square array A152405

1, 4, 22, 152, 1251, 11869, 126987, 1508209, 19651299, 278321523, 4253151796, 69700149063, 1218679465845, 22634882689433, 444893598200458, 9223269744306877, 201091581942120957, 4598872183673896769

Offset

0,2

Comments

Matrix powers of triangle T=A152400 satisfy:

column k of T^(j+1) = column j of T^(k+1) for all j>=0, k>=0.

Links

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

Crossrefs

Cf. A152400; A127715, A152401, A152402, A152403; A152405.

Sequence in context: A039304 A349022 A267219 * A062817 A196275 A000307

Adjacent sequences: A152401 A152402 A152403 * A152405 A152406 A152407

Keyword

nonn

Author

Paul D. Hanna, Dec 05 2008

Status

approved