A152404 - OEIS

%I #2 Mar 30 2012 18:37:15

%S 1,4,22,152,1251,11869,126987,1508209,19651299,278321523,4253151796,

%T 69700149063,1218679465845,22634882689433,444893598200458,

%U 9223269744306877,201091581942120957,4598872183673896769

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

%C Matrix powers of triangle T=A152400 satisfy:

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

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

%K nonn

%O 0,2

%A _Paul D. Hanna_, Dec 05 2008