A129564 A129360 * A000012.

1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1

Offset

1,1

Comments

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

Links

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

Formula

A129360 * A000012 as infinite lower triangular matrices.

Example

First few rows of the triangle:
  1;
  1, 1;
  0, 1, 1;
  1, 1, 1, 1;
  0, 1, 1, 1, 1;
  0, 0, 1, 1, 1, 1;
  0, 1, 1, 1, 1, 1, 1;
  1, 1, 1, 1, 1, 1, 1, 1;
  ...

Crossrefs

Cf. A129360, A000012, A062570.

Sequence in context: A394016 A253414 A127872 * A317193 A293163 A359832

Adjacent sequences: A129561 A129562 A129563 * A129565 A129566 A129567

Keyword

nonn,tabl

Author

Gary W. Adamson, Apr 21 2007

Status

approved