A208152 Triangle by rows, generated from the Ruler sequence A001511.

1, 1, 1, 3, 2, 1, 6, 4, 1, 1, 24, 16, 4, 3, 1, 48, 32, 8, 6, 1, 1, 144, 96, 24, 18, 3, 2, 1, 188, 192, 48, 36, 6, 4, 1, 1, 1440, 960, 240, 180, 30, 20, 5, 4, 1, 2880, 1920, 480, 360, 60, 10, 8, 1, 1, 8640, 5760, 1440, 1080, 180, 120, 30, 24, 3, 2, 1

Offset: 1

Author

Gary W. Adamson, Feb 23 2012

Keywords

• nonn
• tabl

Comments

Row sums = A208147: (1, 2, 6, 12, 48, 96, 288, ...).

Examples

			First few rows of the triangle =
     1;
     1,    1;
     3,    2,    1;
     6,    4,    1,    1;
    24,   16,    4,    3,   1;
    48,   32,    8,    6,   1,   1;
   144,   96,   24,   18,   3,   2,  1;
   288,  192,   48,   36,   6,   4,  1,  1;
  1440,  960,  240,  180,  30,  20,  5,  4, 1;
  2880, 1920,  480,  360,  60,  40, 10,  8, 1, 1;
  8640, 5760, 1440, 1080, 180, 120, 30, 24, 3, 2, 1;
  ...
		

Crossrefs

Cf. A001511, A208147.

Formula

Inverse of:

1;

-1, 1;

-1, -2, 1;

-1, -2, -1, 1;

-1, -2, -1, -3, 1;

-1, -2, -1, -3, -1, 1;

-1, -2, -1, -3, -1, -2, 1;

..., where the signed terms are negatives of A001511 terms: (1, 2, 1, 3, 1, 2, 1, 4, ...).