A131900 A131821 + A128174 - A000012.

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

Offset

0,3

Comments

Row sums = A047219, numbers congruent to {1, 3} (mod 5): (1, 3, 6, 8, 11, 13, ...).

Links

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

Formula

A131821 + A128174 - A000012 as infinite lower triangular matrices.

Example

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

Crossrefs

Cf. A131821, A128174, A047219.

Sequence in context: A051933 A234963 A346275 * A082116 A079777 A224909

Adjacent sequences: A131897 A131898 A131899 * A131901 A131902 A131903

Keyword

nonn,tabl

Author

Gary W. Adamson, Jul 25 2007

Status

approved