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%I #11 Feb 08 2022 22:43:50
%S 1,2,0,3,1,0,4,0,0,0,5,2,1,0,0,6,0,0,0,0,0,7,3,0,1,0,0,0,8,0,2,0,0,0,
%T 0,0,9,4,0,0,1,0,0,0,0,10,0,0,0,0,0,0,0,0,0,11,5,3,2,0,1,0,0,0,0,0,12,
%U 0,0,0,0,0,0,0,0,0,0,0
%N Triangle by columns: (1, 2, 3, ...) in each column interleaved with (0, 1, 2, ...) zeros. Columns > 1 shifted down twice.
%C Row sums of n-th row = A065608(n+1).
%F Triangle, left border = (1, 2, 3, ...). Each successive column is shifted down twice from previous column and interleaved with k zeros.
%e First few rows of the triangle:
%e 1;
%e 2, 0;
%e 3, 1, 0;
%e 4, 0, 0, 0;
%e 5, 2, 1, 0, 0;
%e 6, 0, 0, 0, 0, 0;
%e 7, 3, 0, 1, 0, 0, 0;
%e 8, 0, 2, 0, 0, 0, 0, 0;
%e 9, 4, 0, 0, 1, 0, 0, 0, 0;
%e 10, 0, 0, 0, 0, 0, 0, 0, 0, 0;
%e 11, 5, 3, 2, 0, 1, 0, 0, 0, 0, 0;
%e 12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0;
%e 13, 6, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0;
%e 14, 0, 4, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0;
%e 15, 7, 0, 3, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0;
%e 16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0;
%e 17, 8, 5, 0, 0, 2, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0;
%e 18, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0;
%e 19, 9, 0, 4, 3, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0;
%e ...
%Y Cf. A065608.
%K nonn,tabl
%O 1,2
%A _Gary W. Adamson_ & _Mats Granvik_, Apr 29 2010
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