A134510 A112552 * A128174.

1, 1, 1, 3, 1, 1, 4, 4, 1, 1, 8, 5, 5, 1, 1, 12, 12, 6, 6, 1, 1, 21, 17, 17, 7, 7, 1, 1, 33, 33, 23, 23, 8, 8, 1, 1, 55, 50, 50, 30, 30, 9, 9, 1, 1, 88, 88, 73, 73, 38, 38, 10, 10, 1, 1

Offset

1,4

Comments

Row sums = the nonzero terms of A001629: (1, 2, 5, 10, 20, 38, 71, ...) such that A001629(n+1) = row sums of triangle A134510.

Links

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

Formula

A112552 * A128174 as infinite lower triangular matrices.

Example

First few rows of the triangle:
   1;
   1,  1;
   3,  1,  1;
   4,  4,  1,  1;
   8,  5,  5,  1,  1;
  12, 12,  6,  6,  1,  1;
  21, 17, 17,  7,  7,  1,  1;
  33, 33, 23, 23,  8,  8,  1,  1;
  55, 50, 50, 30, 30,  9,  9,  1,  1;
  ...

Crossrefs

Cf. A112552, A128174, A001629.

Sequence in context: A102716 A173076 A385732 * A335322 A171145 A271644

Adjacent sequences: A134507 A134508 A134509 * A134511 A134512 A134513

Keyword

nonn,tabl

Author

Gary W. Adamson, Oct 28 2007

Status

approved