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.

A125170 Binomial transform of an infinite lower triangular matrix with (1,1,2,4,8,...) in every column and the rest zeros. Let the left column = A007051, then for k > 1, T(n,k) = (n-1,k) + (n-1,k-1).

Original entry on oeis.org

1, 2, 1, 5, 3, 1, 14, 8, 4, 1, 41, 22, 12, 5, 1, 122, 63, 34, 17, 6, 1, 365, 185, 97, 51, 23, 7, 1, 1094, 550, 282, 148, 74, 30, 8, 1, 3281, 1644, 832, 430, 222, 104, 38, 9, 1
Offset: 0

Views

Author

Gary W. Adamson, Nov 22 2006

Keywords

Examples

			(5,3) = 34 = 12 + 22 = (4,3) + (4,2).
First few rows of the triangle:
    1;
    2,  1;
    5,  3,  1;
   14,  8,  4,  1;
   41, 22, 12,  5, 1;
  122, 63, 34, 17, 6, 1;
  ...
		

Crossrefs

Cf. A000244 (row sums), A007051 (left border).

Extensions

Edited by N. J. A. Sloane, Oct 07 200