%I #6 Mar 04 2022 02:05:55
%S 1,3,2,6,2,3,11,4,2,4,20,8,4,2,5,37,16,8,4,2,6,70,32,16,8,4,2,7,135,
%T 64,32,16,8,4,2,8,264,128,64,32,16,8,4,2,9,521,256,128,64,32,16,8,4,2,
%U 10
%N A130321 + A131821 - A000012.
%C Left column = A006127: (1, 3, 6, 11, 20, 37, ...).
%C Row sums = A131898: (1, 5, 11, 21, 39, 73, ...).
%F A131321 + A131821 - A000012 as infinite lower triangular matrices.
%e First few rows of the triangle:
%e 1;
%e 3, 2;
%e 6, 2, 3;
%e 11, 4, 2, 4;
%e 20, 8, 4, 2, 5;
%e 37, 16, 8, 4, 2, 6;
%e 70, 32, 16, 8, 4, 2, 7;
%e ...
%Y Cf. A130321, A131821, A006127, A131898.
%K nonn,tabl
%O 0,2
%A _Gary W. Adamson_, Jul 25 2007
|