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%I #6 Mar 27 2022 18:52:01
%S 1,2,3,3,3,4,4,6,4,7,5,5,5,5,6,6,9,8,9,6,12,7,7,7,7,7,7,8,8,12,8,14,8,
%T 12,8,15,9,9,12,9,9,12,9,9,13,10,15,10,15,12,15,10,15,10,18
%N Triangle read by rows: first n terms of n-th row of an array formed by A126988 * A053731(transform).
%C Right border = sigma(n), A000203: (1, 3, 4, 7, 6, 12, ...).
%C Row sums = A001157: (1, 5, 10, 21, 26, 50, 50, ...).
%e First few terms of the array:
%e 1, 1, 1, 1, 1, 1, 1, ...
%e 2, 3, 2, 3, 2, 3, 2, ...
%e 3, 3, 4, 3, 3, 4, 3, ...
%e 4, 6, 4, 7, 4, 6, 4, ...
%e 5, 5, 5, 5, 5, 6, 5, ...
%e 6, 9, 8, 9, 6, 12, 6, ...
%e 7, 7, 7, 7, 7, 7, 8, ...
%e ...
%e First few rows of the triangle:
%e 1;
%e 2, 3;
%e 3, 3, 4;
%e 4, 6, 4, 7;
%e 5, 5, 5, 5, 6;
%e 6, 9, 8, 9, 6, 12;
%e 7, 7, 7, 7, 7, 7, 8,
%e ...
%Y Cf. A051731, A126988, A001157, A000203.
%K nonn,tabl
%O 0,2
%A _Gary W. Adamson_, Nov 12 2007
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