A128308 Binomial transform of A128307.

1, 1, 1, 2, 2, 1, 6, 4, 3, 1, 19, 10, 7, 4, 1, 59, 29, 17, 11, 5, 1, 180, 88, 46, 28, 16, 6, 1, 544, 268, 134, 74, 44, 22, 7, 1, 1637, 812, 402, 208, 118, 66, 29, 8, 1, 4917, 2449, 1214, 610, 326, 184, 95, 37, 9, 1

Offset

1,4

Comments

Row sums = A007051: (1, 2, 5, 14, 41, 122, ...).

See also the comments in A111277.

Links

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

Formula

A007318 * A128307 as infinite lower triangular matrices.

Example

First few rows of the triangle:
   1;
   1,  1;
   2,  2,  1;
   6,  4,  3,  1;
  19, 10,  7,  4,  1;
  59, 29, 17, 11,  5,  1;
  ...

Crossrefs

Cf. A007051, A128307, A007318.

The first column is A111277.

Sequence in context: A209692 A178886 A065052 * A109152 A130469 A106381

Adjacent sequences: A128305 A128306 A128307 * A128309 A128310 A128311

Keyword

nonn,tabl

Author

Gary W. Adamson, Feb 25 2007

Extensions

Crossref to A111277 added by Peter J. Taylor, Jul 23 2014

Status

approved