A129690 A129688 * A007318.

1, 1, 1, 3, 2, 1, 3, 5, 3, 1, 5, 8, 8, 4, 1, 5, 13, 16, 12, 5, 1, 7, 18, 29, 28, 17, 6, 1, 7, 25, 47, 57, 45, 23, 7, 1, 9, 32, 72, 104, 102, 68, 30, 8, 1, 9, 41, 104, 176, 206, 170, 98, 38, 9, 1

Offset

1,4

Comments

Row sums = A084170: (1, 2, 6, 12, 52, 106, 426, ...). A129689 = A007318 * A129688. Left column = A109613: (1, 1, 3, 3, 5, 5, ...).

Links

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

Formula

A129688 * A007318 as infinite lower triangular matrices.

Example

First few rows of the triangle:
  1;
  1,  1;
  3,  2,  1;
  3,  5,  3,  1;
  5,  8,  8,  4,  1;
  5, 13, 16, 12,  5,  1;
  7, 18, 29, 28, 17,  6,  1;
  ...

Crossrefs

Cf. A057711, A129689, A007318, A129688, A109613.

Sequence in context: A214636 A318582 A318317 * A156665 A215415 A244477

Adjacent sequences: A129687 A129688 A129689 * A129691 A129692 A129693

Keyword

nonn,tabl

Author

Gary W. Adamson, Apr 28 2007

Status

approved