A134199 - OEIS

%I #5 Mar 25 2022 00:36:30

%S 1,3,2,1,6,3,1,2,9,4,1,2,3,12,5,1,2,3,4,15,6,1,2,3,4,5,18,7,1,2,3,4,5,

%T 6,21,8,1,2,3,4,5,6,7,24,9,1,2,3,4,5,6,7,8,27,10

%N A002260 + A134082 - I as infinite lower triangular matrices; I = Identity matrix.

%C Row sums = A052905: (1, 5, 10, 16, 23, 31, 40, ...).

%e First few rows of the triangle:

%e   1;

%e   3,  2;

%e   1,  6,  3;

%e   1,  2,  9,  4;

%e   1,  2,  3, 12,  5;

%e   1,  2,  3,  4, 15,  6;

%e   1,  2,  3,  4,  5, 18,  7;

%e   ...

%Y Cf. A002260, A134082, A052905.

%K nonn,tabl

%O 0,2

%A _Gary W. Adamson_, Oct 13 2007