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%I #5 Feb 20 2022 01:39:36
%S 1,2,1,3,0,1,4,3,0,1,5,0,0,0,1,6,5,4,0,0,1,7,0,0,0,0,0,1,8,7,0,5,0,0,
%T 0,1,9,0,7,0,0,0,0,0,1,10,9,0,0,6,0,0,0,0,1
%N Triangle (n,k) by columns, arithmetic sequences interspersed with k zeros.
%C Row sums = A081307: (1, 3, 4, 8, 6, 16, 8, 21, 17, ...).
%F Arithmetic sequences by columns, (1,2,3,...); (1,3,5,...); (1,4,7,...); interspersed with k zeros, k=0,1,2,...
%e First few rows of the triangle:
%e 1;
%e 2, 1;
%e 3, 0, 1;
%e 4, 3, 0, 1;
%e 5, 0, 0, 0, 1;
%e 6, 5, 4, 0, 0, 1;
%e 7, 0, 0, 0, 0, 0, 1;
%e ...
%Y Cf. A081307, A130027.
%K nonn,tabl
%O 0,2
%A _Gary W. Adamson_, May 02 2007
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