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A131950 A002024 + A131821 + A007318 - 2*A000012 as infinite lower triangular matrices.

%I A131950 #5 Mar 05 2022 01:03:00
%S A131950 1,3,3,5,4,5,7,6,6,7,9,8,10,8,9,11,10,15,15,10,11,13,12,21,26,21,12,
%T A131950 13,15,14,28,42,42,28,14,15,17,16,36,64,78,64,36,16,17,19,18,45,93,
%U A131950 135,135,93,45,18,19
%N A131950 A002024 + A131821 + A007318 - 2*A000012 as infinite lower triangular matrices.
%C A131950 Row sums = A131951: (1, 6, 14, 26, 44, 72, ...).
%e A131950 First few rows of the triangle:
%e A131950    1;
%e A131950    3,  3;
%e A131950    5,  4,  5;
%e A131950    7,  6,  6,  7;
%e A131950    9,  8, 10,  8,  9;
%e A131950   11, 10, 15, 15, 10, 11;
%e A131950   13, 12, 21, 26, 21, 12, 13;
%e A131950   15, 14, 28, 42, 42, 28, 14, 15;
%e A131950   ...
%Y A131950 Cf. A002024, A131821, A007318, A000012, A131951.
%K A131950 nonn,tabl
%O A131950 0,2
%A A131950 _Gary W. Adamson_, Jul 30 2007