cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A130026 Triangle (n,k) by columns, arithmetic sequences interspersed with k zeros.

Original entry on oeis.org

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

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Author

Gary W. Adamson, May 02 2007

Keywords

Comments

Row sums = A081307: (1, 3, 4, 8, 6, 16, 8, 21, 17, ...).

Examples

			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

Formula

Arithmetic sequences by columns, (1,2,3,...); (1,3,5,...); (1,4,7,...); interspersed with k zeros, k=0,1,2,...
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