A130298 A051340 * A130296.

1, 5, 2, 12, 4, 3, 22, 6, 5, 4, 35, 8, 7, 6, 5, 51, 10, 9, 8, 7, 6, 70, 12, 11, 10, 9, 8, 7, 92, 14, 13, 12, 11, 10, 9, 8, 117, 16, 15, 14, 13, 12, 11, 10, 9, 145, 18, 17, 16, 15, 14, 13, 12, 11, 10

Offset

1,2

Comments

Row sums = A003215: (1, 7, 19, 37, 61, 91, ...).

Left border = A000326: (1, 5, 12, 22, 35, ...).

A130299 = A130296 * A051340.

Links

Table of n, a(n) for n=1..55.

Formula

A051340 * A130296 as infinite lower triangular matrices.

Example

First few rows of the triangle:
   1;
   5,  2;
  12,  4,  3;
  22,  6,  5,  4;
  35,  8,  7,  6, 5;
  51, 10,  9,  8, 7, 6;
  70, 12, 11, 10, 9, 8, 7;
  ...

Crossrefs

Cf. A051340, A130296, A003215, A000326.

Sequence in context: A275509 A286142 A286143 * A128116 A082153 A283944

Adjacent sequences: A130295 A130296 A130297 * A130299 A130300 A130301

Keyword

nonn,tabl

Author

Gary W. Adamson, May 20 2007

Status

approved