A132776 A128064 (unsigned) * A007318.

1, 3, 2, 5, 8, 3, 7, 18, 15, 4, 9, 32, 42, 24, 5, 11, 50, 90, 80, 35, 6, 13, 72, 165, 200, 135, 48, 7, 15, 98, 273, 420, 385, 210, 63, 8, 17, 128, 420, 784, 910, 672, 308, 80, 9, 19, 162, 612, 1344, 1890, 1764, 1092, 432, 99, 10

Offset

0,2

Comments

Row sums = A053220: (1, 5, 16, 44, 112, 272, ...).

A003506 = A007318 * A128064 (unsigned).

Links

Table of n, a(n) for n=0..54.

Formula

A128064 (unsigned) * A007318 as infinite lower triangular matrices.

Example

First few rows of the triangle:
   1;
   3,  2;
   5,  8,  3;
   7, 18, 15,  4;
   9, 32, 42, 24,  5;
  11, 50, 90, 80, 35,  6;
  ...

Crossrefs

Cf. A007318, A128064, A053220, A003506.

Sequence in context: A195628 A124422 A223544 * A367208 A249741 A246275

Adjacent sequences: A132773 A132774 A132775 * A132777 A132778 A132779

Keyword

nonn,tabl

Author

Gary W. Adamson, Aug 29 2007

Status

approved