A130307 A051731 * A130296.

1, 3, 1, 4, 1, 1, 7, 2, 1, 1, 6, 1, 1, 1, 1, 12, 3, 2, 1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 15, 3, 2, 2, 1, 1, 1, 1, 13, 2, 2, 1, 1, 1, 1, 1, 1, 18, 3, 2, 2, 2, 1, 1, 1, 1, 1

Offset

0,2

Comments

Row sums = A129235, (1, 4, 6, 11, 10, 20, 14, ...).

Left column = sigma(n), A000203.

Links

Table of n, a(n) for n=0..54.

Formula

Inverse Moebius transform of A130296.

Example

First few rows of the triangle:
   1;
   3, 1;
   4, 1, 1;
   7, 2, 1, 1;
   6, 1, 1, 1, 1;
  12, 3, 2, 1, 1, 1;
   8, 1, 1, 1, 1, 1, 1;
  ...

Crossrefs

Cf. A130296, A051731, A129235, A000203.

Sequence in context: A329316 A109411 A302240 * A130314 A334466 A127057

Adjacent sequences: A130304 A130305 A130306 * A130308 A130309 A130310

Keyword

nonn

Author

Gary W. Adamson, May 20 2007

Status

approved