A133735 A000012 * A133734.

1, 2, 0, 3, 0, 1, 4, 0, 2, 1, 5, 0, 3, 2, 2, 6, 0, 4, 3, 4, 2, 7, 0, 5, 4, 6, 4, 4, 8, 0, 6, 5, 8, 6, 8, 4, 9, 0, 7, 6, 10, 8, 12, 8, 7, 10, 0, 8, 7, 12, 10, 16, 12, 14, 8

Offset

0,2

Comments

Row sums = A000070: (1, 2, 4, 7, 12, 19, 30, 45, ...).

Right border = A002865: (1, 0, 1, 1, 2, 2, 4, 4, 7, 8, ...).

Links

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

Formula

A000012 * A133734 as infinite lower triangular matrices.

Example

First few rows of the triangle:
  1;
  2, 0;
  3, 0, 1;
  4, 0, 2, 1;
  5, 0, 3, 2,  2;
  6, 0, 4, 3,  4, 2;
  7, 0, 5, 4,  6, 4,  4;
  8, 0, 6, 5,  8, 6,  8, 4;
  9, 0, 7, 6, 10, 8, 12, 8, 7;
  ...

Crossrefs

Cf. A133734, A000070.

Sequence in context: A362755 A035614 A212138 * A238801 A095704 A351964

Adjacent sequences: A133732 A133733 A133734 * A133736 A133737 A133738

Keyword

nonn,tabl

Author

Gary W. Adamson, Sep 22 2007

Status

approved