A137640 -id:A137640 - cp's OEIS frontend

A137639 Triangle read by rows, A026794 * A051731.

1, 2, 1, 3, 0, 1, 5, 2, 0, 1, 7, 1, 0, 0, 1, 11, 3, 2, 0, 0, 1, 15, 2, 1, 0, 0, 0, 1, 22, 6, 1, 2, 0, 0, 0, 1, 30, 5, 3, 1, 0, 0, 0, 0, 1, 42, 9, 2, 1, 2, 0, 0, 0, 0, 1, 56, 9, 3, 1, 1, 0, 0, 0, 0, 0, 1, 77, 16, 6, 3, 1, 2, 0, 0, 0, 0, 0, 1

Offset: 1

Graph
List
Refs
Listen
History
Text
Internal format

Gary W. Adamson, Jan 31 2008

nonn
tabl

Left border = A000041 starting with offset 1: (1, 2, 3, 5, 7, 11, 15, ...).

Row sums = A137640: (1, 3, 4, 8, 9, 17, 19, ...).

			First few rows of the triangle:
   1;
   2, 1;
   3, 0, 1;
   5, 2, 0, 1;
   7, 1, 0, 0, 1;
  11, 3, 2, 0, 0, 1;
  15, 2, 1, 0, 0, 0, 1;
  22, 6, 1, 2, 0, 0, 0, 1;
  30, 5, 3, 1, 0, 0, 0, 0, 1;
  ...

Cf. A000041, A137640, A026794, A051731.

A026794 * A051731 as infinite lower triangular matrices.

cp's OEIS Frontend

A137639 Triangle read by rows, A026794 * A051731.

Views

Author

Keywords

Comments

Examples

Crossrefs

Formula