A134225 A007436 + A134082 - A000012 as infinite lower triangular matrices; where A000012 = (1; 1,1; 1,1,1; ...).

1, 3, 1, 2, 5, 1, 3, 2, 7, 1, 4, 3, 2, 9, 1, 5, 4, 3, 2, 11, 1, 6, 5, 4, 3, 2, 13, 1, 7, 6, 5, 4, 3, 2, 15, 1, 8, 7, 6, 5, 4, 3, 2, 17, 1, 9, 8, 7, 6, 5, 4, 3, 2, 19, 1

Offset

1,2

Comments

Row sums = A034856: (1, 4, 8, 13, 19, 26, ...).

Links

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

Example

First few rows of the triangle:
  1;
  3, 1;
  2, 5, 1;
  3, 2, 7, 1;
  4, 3, 2, 9,  1;
  5, 4, 3, 2, 11,  1;
  6, 5, 4, 3,  2, 13,  1;
  7, 6, 5, 4,  3,  2, 15, 1;
  ...

Crossrefs

Cf. A007436, A134082, A034856.

Sequence in context: A357498 A131127 A113141 * A136081 A083106 A227042

Adjacent sequences: A134222 A134223 A134224 * A134226 A134227 A134228

Keyword

nonn,tabl

Author

Gary W. Adamson, Oct 14 2007

Status

approved