A105537 - OEIS

%I #3 Mar 30 2012 18:36:45

%S 1,2,1,4,4,1,6,8,2,1,12,26,7,12,4,21,55,15,34,12,1,32,91,25,65,22,2,1,

%T 52,178,44,237,80,10,24,9,83,329,74,593,200,27,82,32,1,127,557,117,

%U 1178,396,55,196,76,4,1,185,866,174,1990,670,95,361,135,8,2,1,273,1411,261

%N Matrix square of triangle A105535 and, in this flattened form as read by rows, also equals diagonal 1 of A105535.

%C Diagonal n of triangular matrix A105535 equals A105535^(n+1) when flattened as read by rows.

%e Triangle begins:

%e 1;

%e 2,1;

%e 4,4,1;

%e 6,8,2,1;

%e 12,26,7,12,4;

%e 21,55,15,34,12,1;

%e 32,91,25,65,22,2,1;

%e 52,178,44,237,80,10,24,9;

%e 83,329,74,593,200,27,82,32,1;

%e 127,557,117,1178,396,55,196,76,4,1; ...

%o (PARI)

%Y Cf. A105535, A105538 (row sums).

%K nonn,tabl

%O 0,2

%A _Paul D. Hanna_, Apr 12 2005