A157030 - OEIS

%I #6 Mar 03 2013 13:08:30

%S 1,2,0,2,1,0,4,0,1,0,2,1,1,1,0,8,3,0,0,1,0,2,1,1,1,1,1,0,10,0,5,0,1,0,

%T 1,0,8,7,0,1,1,0,1,1,0,12,5,6,5,0,0,10,1,0,2,1,1,1,1,1,1,1,1,1,0,34,

%U 10,10,0,7,0,10,0,0,1,0

%N Triangle read by rows, A156834 * A054521

%C Left border = A157019: (1, 2, 2, 4, 2, 8, 2, 10,...).

%F Triangle read by rows, A156834 * A054521; as infinite lower triangular matrices.

%e First few rows of the triangle =

%e 1;

%e 2, 0;

%e 2, 1, 0;

%e 4, 0, 1, 0;

%e 2, 1, 1, 1, 0;

%e 8, 3, 0, 0, 1, 0;

%e 2, 1, 1, 1, 1, 1, 0;

%e 10, 0, 5, 0, 1, 0, 1, 0;

%e 8, 7, 0, 1, 1, 0, 1, 1, 0;

%e 12, 5, 6, 5, 0, 0, 10, 1, 0;

%e 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0;

%e 34, 10, 10, 0, 7, 0, 1, 0, 0, 0, 1, 0;

%e 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0;

%e ...

%Y Cf. A156834 (row sums), A054521.

%K nonn,tabl,more

%O 1,2

%A _Gary W. Adamson_ and _Mats Granvik_, Feb 21 2009