A133934 A007318 * (a diagonalized version of A124625).

1, 1, 2, 1, 4, 1, 1, 6, 3, 4, 1, 8, 6, 16, 1, 1, 10, 10, 40, 5, 6, 1, 12, 15, 80, 15, 36, 1, 1, 14, 21, 140, 35, 126, 7, 8, 1, 16, 28, 224, 70, 336, 28, 64, 1, 1, 18, 36, 336, 126, 756, 84, 288, 9, 10

Offset

1,3

Comments

Row sums = A129954: (1, 3, 6, 14, 32, 72, 160, ...).

Links

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

Formula

Binomial transform of an infinite lower triangular matrix, with (1, 2, 1, 4, 1, 6, ...) in the main diagonal and zeros elsewhere.

Example

First few rows of the triangle:
  1;
  1,  2;
  1,  4,  1;
  1,  6,  3,  4;
  1,  8,  6, 16,  1;
  1, 10, 10, 40,  5,  6;
  1, 12, 15, 80, 15, 36,  1;
  ...

Crossrefs

Cf. A129954.

Sequence in context: A191392 A127625 A124844 * A055327 A105260 A099510

Adjacent sequences: A133931 A133932 A133933 * A133935 A133936 A133937

Keyword

nonn,tabl

Author

Gary W. Adamson, Sep 29 2007

Status

approved