A134841 Triangle read by rows: first n terms of n-th row of an array formed by A126988 * A053731(transform).

1, 2, 3, 3, 3, 4, 4, 6, 4, 7, 5, 5, 5, 5, 6, 6, 9, 8, 9, 6, 12, 7, 7, 7, 7, 7, 7, 8, 8, 12, 8, 14, 8, 12, 8, 15, 9, 9, 12, 9, 9, 12, 9, 9, 13, 10, 15, 10, 15, 12, 15, 10, 15, 10, 18

Offset

0,2

Comments

Right border = sigma(n), A000203: (1, 3, 4, 7, 6, 12, ...).

Row sums = A001157: (1, 5, 10, 21, 26, 50, 50, ...).

Links

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

Example

First few terms of the array:
  1,  1,  1,  1,  1,  1,  1, ...
  2,  3,  2,  3,  2,  3,  2, ...
  3,  3,  4,  3,  3,  4,  3, ...
  4,  6,  4,  7,  4,  6,  4, ...
  5,  5,  5,  5,  5,  6,  5, ...
  6,  9,  8,  9,  6, 12,  6, ...
  7,  7,  7,  7,  7,  7,  8, ...
  ...
First few rows of the triangle:
  1;
  2,  3;
  3,  3,  4;
  4,  6,  4,  7;
  5,  5,  5,  5,  6;
  6,  9,  8,  9,  6, 12;
  7,  7,  7,  7,  7,  7,  8,
  ...

Crossrefs

Cf. A051731, A126988, A001157, A000203.

Sequence in context: A029108 A350812 A181550 * A071112 A097087 A153161

Adjacent sequences: A134838 A134839 A134840 * A134842 A134843 A134844

Keyword

nonn,tabl

Author

Gary W. Adamson, Nov 12 2007

Status

approved