A129560 A054523 * A128174.

1, 1, 1, 3, 0, 1, 3, 2, 0, 1, 7, 0, 1, 0, 1, 5, 4, 1, 1, 0, 1, 13, 0, 1, 0, 1, 0, 1, 9, 6, 1, 2, 0, 1, 0, 1, 19, 0, 3, 0, 1, 0, 1, 0, 1, 13, 10, 1, 2, 1, 1, 0, 1, 0, 1

Offset

1,4

Comments

Row sums = A002620: (1, 2, 4, 6, 9, 12, 16, 20, ...). Left column = A106477: (1, 1, 3, 3, 7, 5, 13, 9, 19, ...).

Links

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

Formula

A054523 * A128174 as infinite lower triangular matrices.

Example

First few rows of the triangle:
   1;
   1, 1;
   3, 0, 1;
   3, 2, 0, 1;
   7, 0, 1, 0, 1;
   5, 4, 1, 1, 0, 1;
  13, 0, 1, 0, 1, 0, 1;
  ...

Crossrefs

Cf. A054523, A128174, A106477, A002620.

Sequence in context: A035650 A084475 A130028 * A218603 A207032 A169940

Adjacent sequences: A129557 A129558 A129559 * A129561 A129562 A129563

Keyword

nonn,tabl

Author

Gary W. Adamson, Apr 20 2007

Status

approved