%I A131950
%S A131950 1,3,3,5,4,5,7,6,6,7,9,8,10,8,9,11,10,15,15,10,11,13,12,21,26,21,12,13,
%T A131950 15,14,28,42,42,28,14,15,17,16,36,64,78,64,36,16,17,19,18,45,93,135,135,
%U A131950 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 are:
%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.
%Y A131950 Sequence in context: A122037 A008316 A072820 this_sequence A116192 A090104 
               A075795
%Y A131950 Adjacent sequences: A131947 A131948 A131949 this_sequence A131951 A131952 
               A131953
%K A131950 nonn,tabl
%O A131950 0,2
%A A131950 Gary W. Adamson (qntmpkt(AT)yahoo.com), Jul 30 2007