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%I #12 Sep 01 2024 14:05:09
%S 1,4,3,8,8,5,13,14,12,7,19,21,20,16,9,26,29,29,26,20,11,34,38,39,37,
%T 32,24,13,43,48,50,49,45,38,28,15,53,59,62,62,59,53,44,32,17,64,71,75,
%U 76,74,69,61,50,36,19,76,84,89,91,90,86,79,69,56,40,21,89,98,104,107,107,104,98,89,77,62,44,23
%N Duplicate of A131416.
%C Row sums = A127736: (1, 7, 21, 46, 85, 141, 217, ...).
%F (A000012 * A002260 + A002260 * A000012) - A000012 as infinite lower triangular matrices; where A000012 = (1; 1,1; 1,1,1; ...) and A002260 = (1; 1,2; 1,2,3; ...).
%e First few rows of the triangle:
%e 1;
%e 4, 3;
%e 8, 8, 5;
%e 13, 14, 12, 7;
%e 19, 21, 20, 16, 9;
%e 26, 29, 29, 26, 20, 11;
%e ...
%Y Cf. A002260, A127736.
%K dead
%O 1,2
%A _Gary W. Adamson_, Oct 23 2007
%E a(6) corrected and more terms from _Georg Fischer_, Jun 05 2023