A129571 A129360 * A007318.

1, 1, 1, 0, 2, 1, 1, 3, 3, 1, 0, 4, 6, 4, 1, 0, 4, 10, 10, 5, 1, 0, 6, 15, 20, 15, 6, 1, 1, 7, 21, 35, 35, 21, 7, 1, 0, 6, 27, 56, 70, 56, 28, 8, 1, 0, 8, 36, 84, 126, 126, 84, 36, 9, 1

Offset

1,5

Comments

First 10 row sums match A128022: (1, 2, 3, 8, 15, 30, 63, 128, 252, 510, ...). A129570 = A007318 * A129360.

Links

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

Formula

A129360 * A007318 as infinite lower triangular matrices.

Example

First few rows of the triangle:
  1;
  1,  1;
  0,  2,  1;
  1,  3,  3,  1;
  0,  4,  6,  4,  1;
  0,  4, 10, 10,  5,  1;
  0,  6, 15, 20, 15,  6,  1;
  1,  7, 21, 35, 35, 21,  7,  1;
  ...

Crossrefs

Cf. A007318, A129360, A128022, A129570.

Sequence in context: A370140 A216210 A186332 * A180180 A034931 A248473

Adjacent sequences: A129568 A129569 A129570 * A129572 A129573 A129574

Keyword

nonn,tabl

Author

Gary W. Adamson, Apr 22 2007

Status

approved