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.

Showing 1-1 of 1 results.

A128141 A122432 (unsigned) * A128132.

Original entry on oeis.org

1, 2, 2, 3, 5, 3, 4, 9, 8, 4, 5, 14, 15, 11, 5, 6, 20, 24, 21, 14, 6, 7, 27, 35, 34, 27, 17, 7, 8, 35, 48, 50, 44, 33, 20, 8, 9, 44, 63, 69, 65, 54, 39, 23, 9, 10, 54, 80, 91, 90, 80, 64, 45, 26, 10
Offset: 1

Views

Author

Gary W. Adamson, Feb 16 2007

Keywords

Comments

Row sums = A006522 starting (1, 4, 11, 25, 50, 91, ...). A128142 = A128132 * A122432.

Examples

			First few rows of the triangle:
  1;
  2,  2;
  3,  5,  3;
  4,  9,  8,  4;
  5, 14, 15, 11,  5;
  6, 20, 24, 21, 14,  6;
  7, 27, 35, 34, 27, 17,  7;
  ...

Crossrefs

Cf. A122432, A128132, A006522, A128142, A006325.

Formula

Unsigned A122432 * A128132 as infinite lower triangular matrices; where unsigned A122432 = (1; 3, 1; 6, 3, 1; ...).
Showing 1-1 of 1 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.