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A130026
Triangle (n,k) by columns, arithmetic sequences interspersed with k zeros.
1
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, 0, 1, 9, 0, 7, 0, 0, 0, 0, 0, 1, 10, 9, 0, 0, 6, 0, 0, 0, 0, 1
OFFSET
0,2
COMMENTS
Row sums = A081307: (1, 3, 4, 8, 6, 16, 8, 21, 17, ...).
FORMULA
Arithmetic sequences by columns, (1,2,3,...); (1,3,5,...); (1,4,7,...); interspersed with k zeros, k=0,1,2,...
EXAMPLE
First few rows of the triangle:
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;
...
CROSSREFS
Sequence in context: A280499 A347351 A355342 * A113287 A195665 A096798
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, May 02 2007
STATUS
approved