A134544 - OEIS

%I #8 Mar 26 2022 10:21:22

%S 1,2,2,2,2,3,3,4,3,4,2,2,3,4,5,4,6,6,4,5,6,2,2,3,4,5,6,7,4,6,6,8,5,6,

%T 7,8,3,4,6,4,5,6,7,8,9,4,6,6,8,10,6,7,8,9,10

%N A051731 * A002260.

%C Row sums = A007437: (1, 4, 7, 14, 16, 3, 29, 50, ...).

%C Left border = A000010.

%F A051731 * A002260 as infinite lower triangular matrices.

%e First few rows of the triangle:

%e   1;

%e   2,  2;

%e   2,  2,  3;

%e   3,  4,  3,  4;

%e   2,  2,  3,  4,  5;

%e   4,  6,  6,  4,  5,  6;

%e   2,  2,  3,  4,  5,  6,  7;

%e   4,  6,  6,  8,  5,  6,  7,  8;

%e   3,  4,  6,  4,  5,  6,  7,  8,  9;

%e   4,  6,  6,  8, 10,  6,  7,  8,  9, 10;

%e   ...

%Y Cf. A054731, A007437, A000010.

%K nonn,tabl,more

%O 1,2

%A _Gary W. Adamson_, Oct 31 2007