A131035 A051340 * A129686 as infinite lower triangular matrices.

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

Offset

1,2

Comments

Row sums give A008486.

Links

Table of n, a(n) for n=1..45.

Example

First few rows of the triangle:
   1;
   2, 1;
   4, 1, 1;
   5, 2, 1, 1;
   6, 2, 2, 1, 1;
   7, 2, 2, 2, 1, 1;
   8, 2, 2, 2, 2, 1, 1;
   9, 2, 2, 2, 2, 2, 1, 1;
  10, 2, 2, 2, 2, 2, 2, 1, 1;
  ...

Crossrefs

Cf. A051340, A129686, A008486, A131034.

Sequence in context: A162944 A140582 A062866 * A339833 A118745 A235671

Adjacent sequences: A131032 A131033 A131034 * A131036 A131037 A131038

Keyword

nonn,tabl,more

Author

Gary W. Adamson, Jun 10 2007

Status

approved