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.

A132775 A007818 * A132774.

Original entry on oeis.org

1, 3, 3, 5, 10, 5, 7, 21, 21, 7, 9, 36, 54, 36, 9, 11, 55, 110, 110, 55, 11, 13, 78, 195, 260, 195, 78, 13, 15, 105, 315, 525, 525, 315, 105, 15, 17, 136, 476, 952, 1190, 952, 476, 136, 17, 19, 171, 684, 1596, 2394, 2394, 1596, 684, 171, 19
Offset: 0

Views

Author

Gary W. Adamson, Aug 29 2007

Keywords

Comments

Row sums = A014480: (1, 6, 20, 56, 144, 352, 832, ...).

Examples

			First few rows of the triangle:
   1;
   3,   3;
   5,  10,   5;
   7,  21,  21,   7;
   9,  36,  54,  36,   9;
  11,  55, 110, 110,  55,  11;
  13,  78, 195, 260, 195,  78,  13;
  15, 105, 315, 525, 525, 315, 105, 15;
  ...
Row 3 = (7, 21, 21, 7) = 7 * (1, 3, 3, 1).
		

Crossrefs

Formula

Binomial transform of A132774. T(n,k) = (2n+1) * A007318(n,k).