A131255 A004070 * A000012(signed).

1, 0, 1, 0, 1, 1, 1, 0, 2, 1, 0, 1, 1, 3, 1, 0, 1, 1, 3, 4, 1, 1, 0, 2, 2, 6, 5, 1, 0, 1, 1, 3, 5, 10, 6, 1, 0, 1, 1, 3, 5, 11, 15, 7, 1, 1, 0, 2, 2, 6, 10, 21, 21, 8, 1

Offset

0,9

Comments

Row sums = A004695 starting (1, 1, 2, 4, 6, 10, 17, 27, 44, 72, ...). A058393 = A000012(signed) * A004070.

Links

Table of n, a(n) for n=0..54.

Formula

A004070 * A000012, where A000012 = (1; -1,1; 1,-1,1; ...).

Example

First few rows of the triangle:
  1;
  0,  1;
  0,  1,  1;
  1,  0,  2,  1;
  0,  1,  1,  3,  1;
  0,  1,  1,  3,  4,  1;
  1,  0,  2,  2,  6,  5,  1;
  0,  1,  1,  3,  5, 10,  6,  1;
  0,  1,  1,  3,  5, 11, 15,  7,  1;
  1,  0,  2,  2,  6, 10,  2, 21,  8,  1;
  ...

Crossrefs

Cf. A004070, A000012, A004695, A058393.

Sequence in context: A214015 A137560 A201093 * A344566 A198295 A221857

Adjacent sequences: A131252 A131253 A131254 * A131256 A131257 A131258

Keyword

nonn,tabl

Author

Gary W. Adamson, Jun 23 2007

Status

approved