A134839 Triangle, n-th row = first n terms in n-th row of an array formed by A051731 * A126988(transform).

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

Offset

1,3

Comments

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

Row sums = A007437: (1, 4, 7, 14, 16, 31, 29, 50, ...).

Links

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

Formula

Given the array formed by A051731 * A126988(transform), the triangle by rows = first n terms of n-th row of the array.

Example

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

Crossrefs

Cf. A126988, A051731, A000203, A007437.

Sequence in context: A080890 A251621 A016468 * A077581 A130419 A083110

Adjacent sequences: A134836 A134837 A134838 * A134840 A134841 A134842

Keyword

nonn,tabl

Author

Gary W. Adamson, Nov 12 2007

Status

approved