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%I #9 Mar 04 2022 11:18:56
%S 1,3,1,1,3,1,3,3,3,1,1,5,5,3,1,3,5,7,7,3,1,1,7,11,9,9,3,1,3,7,13,19,
%T 11,11,3,1,1,9,19,21,29,13,13,3,1,3,9,21,39,31,41,15,15,3,1
%N 2*A046854 - A000012 (signed by columns + - + -, ...).
%C Row sums = A131780: (1, 4, 5, 10, 15, 26, 41, ...), a sequence with a(n)/a(n-1) tending to phi.
%C A131779 is a companion triangle, same row sums.
%e First few rows of the triangle:
%e 1;
%e 3, 1;
%e 1, 3, 1;
%e 3, 3, 3, 1;
%e 1, 5, 5, 3, 1;
%e 3, 5, 7, 7, 3, 1;
%e 1, 7, 11, 9, 9, 3, 1;
%e 3, 7, 13, 19, 11, 11, 3, 1;
%e ...
%Y Cf. A131779, A131780, A046854, A000012.
%K nonn,tabl
%O 1,2
%A _Gary W. Adamson_, Jul 14 2007