A137594 Triangle read by rows: A007318 * A136717.

1, 1, 2, 1, 6, 4, 1, 12, 24, 12, 1, 20, 72, 120, 48, 1, 30, 160, 552, 696, 192, 1, 42, 300, 1752, 4416, 4272, 960, 1, 56, 504, 4452, 17976, 36672, 30480, 5760, 1, 72, 784, 9744, 55776, 195312, 350880, 229680, 34560

Offset

0,3

Comments

Row sums = A001339: (1, 3, 11, 49, 261, ...).

Links

Table of n, a(n) for n=0..44.

Formula

Binomial transform of A136717.

Example

First few rows of the triangle:
  1;
  1,  2;
  1,  6,   4;
  1, 12,  24,   12;
  1, 20,  72,  120,   48;
  1, 30, 160,  552,  696,  192;
  1, 42, 300, 1752, 4416, 4272, 960;
  ...

Crossrefs

Cf. A136717, A001339.

Sequence in context: A123519 A167024 A114687 * A112360 A250485 A269505

Adjacent sequences: A137591 A137592 A137593 * A137595 A137596 A137597

Keyword

nonn,tabl

Author

Gary W. Adamson, Jan 28 2008

Status

approved