A134676 A127172 * A127648.

1, 3, 2, 3, 0, 3, 6, 6, 0, 4, 3, 0, 0, 0, 5, 9, 6, 9, 0, 0, 6, 3, 0, 0, 0, 0, 0, 7, 10, 12, 0, 12, 0, 0, 0, 8, 6, 0, 9, 0, 0, 0, 0, 0, 9, 9, 6, 0, 0, 15, 0, 0, 0, 0, 10

Offset

1,2

Comments

Left column = A007425: (1, 3, 3, 6, 3, 9, 3, 10, ...).

Row sums = A007430: (1, 5, 6, 16, 8, 30, 10, 42, ...).

Links

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

Formula

A127172 * A127648 = A051731^3 * A127648 as infinite lower triangular matrices.

Example

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

Crossrefs

Cf. A127172, A051731, A127648, A007430, A007425.

Sequence in context: A230409 A244543 A283979 * A286246 A286249 A239146

Adjacent sequences: A134673 A134674 A134675 * A134677 A134678 A134679

Keyword

nonn,tabl,more

Author

Gary W. Adamson, Nov 05 2007

Status

approved