A134224 A004736 + A134082 - I as infinite lower triangular matrices; I = Identity matrix.

1, 4, 1, 3, 6, 1, 4, 3, 8, 1, 5, 4, 3, 10, 1, 6, 5, 4, 3, 12, 1, 7, 6, 5, 4, 3, 14, 1, 8, 7, 6, 5, 4, 3, 16, 1, 9, 8, 7, 6, 5, 4, 3, 18, 1, 10, 9, 8, 7, 6, 5, 4, 3, 20, 1

Offset

0,2

Comments

Row sums = A052905: (1, 5, 10, 16, 23, 31, 40, ...).

Links

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

Example

First few rows of the triangle:
  1;
  4,  1;
  3,  6,  1;
  4,  3,  8,  1;
  5,  4,  3, 10,  1;
  6,  5,  4,  3, 12,  1;
  7,  6,  5,  4,  3, 14,  1;
  ...

Crossrefs

Cf. A004736, A052905, A134082.

Sequence in context: A343571 A308633 A299616 * A121441 A256243 A190479

Adjacent sequences: A134221 A134222 A134223 * A134225 A134226 A134227

Keyword

nonn,tabl

Author

Gary W. Adamson, Oct 14 2007

Status

approved