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A152404
Column 1 of matrix square of triangle A152400; also, column 3 of square array A152405
5
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.
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Dec 05 2008
STATUS
approved