A128544 A007318 * A128540.

1, 2, 1, 3, 4, 2, 4, 9, 9, 3, 5, 16, 24, 17, 5, 6, 25, 50, 55, 33, 8, 7, 36, 90, 135, 123, 61, 13, 8, 49, 147, 280, 343, 259, 112, 21, 9, 64, 224, 518, 798, 812, 532, 202, 34, 10, 81, 324, 882, 1638, 2100, 1848, 1062, 361, 55

Offset

0,2

Comments

Row sums = A069403: (1, 3, 9, 25, 67, ...).

Links

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

Formula

A007318 * A128540 as infinite lower triangular matrices; (binomial transform of A128540).

Example

First few rows of the triangle:
  1;
  2,  1;
  3,  4,  2;
  4,  9,  9,   3;
  5, 16, 24,  17,   5;
  6, 25, 50,  55,  33,  8;
  7, 36, 90, 135, 123, 61, 13;
  ...

Crossrefs

Cf. A007318, A128540, A069403.

Sequence in context: A130585 A209151 A125100 * A120058 A208532 A245334

Adjacent sequences: A128541 A128542 A128543 * A128545 A128546 A128547

Keyword

nonn,tabl

Author

Gary W. Adamson, Mar 10 2007

Status

approved