A129558 A054523 * A129360.

1, 1, 1, 1, 0, 1, 2, 1, 0, 1, 3, 0, 0, 0, 1, 1, 1, 1, 0, 0, 1, 5, 0, 0, 0, 0, 0, 1, 4, 2, 0, 1, 0, 0, 0, 1, 4, 0, 1, 0, 0, 0, 0, 0, 1, 3, 3, 0, 0, 1, 0, 0, 0, 0, 1

Offset

1,7

Comments

Row sums = A062570, phi(2*n): (1, 2, 2, 4, 4, 4, 6, 8, ...).

Links

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

Formula

A054523 * A129360 as infinite lower triangular matrices.

Example

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

Crossrefs

Cf. A054523, A129360, A062570.

Sequence in context: A195982 A102761 A231119 * A353414 A267181 A131185

Adjacent sequences: A129555 A129556 A129557 * A129559 A129560 A129561

Keyword

nonn,tabl

Author

Gary W. Adamson, Apr 20 2007

Status

approved