A129236 A054525 * A129234.

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

Offset

1,3

Comments

Left border = phi(n), A000010: (1, 1, 2, 2, 4, 2, 6, ...). A129237 = inverse Moebius transform of A129234.

Links

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

Formula

A054525 * A129234 as infinite lower triangular matrices.

Example

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

Crossrefs

Cf. A129234, A129235, A129237.

Sequence in context: A093949 A324518 A108807 * A127465 A339033 A327028

Adjacent sequences: A129233 A129234 A129235 * A129237 A129238 A129239

Keyword

nonn,tabl

Author

Gary W. Adamson, Apr 05 2007

Status

approved