A134065 Triangle read by rows: A134059 + A124927 - A007318 as infinite lower triangular matrices.

1, 3, 4, 3, 8, 4, 3, 12, 12, 4, 3, 16, 24, 16, 4, 3, 20, 40, 40, 20, 4, 3, 24, 60, 80, 60, 24, 4, 3, 28, 84, 140, 140, 84, 28, 4, 3, 32, 112, 224, 280, 224, 112, 32, 4, 3, 36, 144, 336, 504, 504, 336, 144, 36, 4, 3, 40, 180, 480, 840, 1008, 840, 480, 180, 40, 4, 3, 44, 220, 660, 1320, 1848, 1848, 1320, 660, 220, 44, 4

Offset: 0

Author

Gary W. Adamson, Oct 05 2007

Keywords

• nonn
• tabl

Comments

Row sums = A078485 starting (1, 7, 15, 31, 63, 127, ...).

Examples

			First few rows of the triangle:
  1;
  3,  4;
  3,  8,  4;
  3, 12, 12,  4;
  3, 16, 24, 16,  4;
  3, 20, 40, 40, 20,  4;
  ...
		

Crossrefs

Cf. A078485, A124927, A134059.

Extensions

a(15) = 3 inserted and more terms from Georg Fischer, Jun 07 2023