A131324 2*A049310 - A000012(signed).

1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 5, 1, 1, 1, 5, 1, 7, 1, 1, 1, 1, 11, 1, 9, 1, 1, 1, 7, 1, 19, 1, 11, 1, 1, 1, 1, 19, 1, 29, 1, 13, 1, 1, 1, 9, 1, 39, 1, 41, 1, 15, 1, 1

Offset

0,8

Comments

Row sums = A062114: (1, 2, 3, 6, 9, 16, 25, ...).

Links

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

Formula

2*A049310 - A000012(signed + - + - ... by columns).

Example

First few rows of the triangle:
  1;
  1,  1;
  1,  1,  1;
  1,  3,  1,  1;
  1,  1,  5,  1,  1;
  1,  5,  1,  7,  1,  1,
  1,  1, 11,  1,  9,  1,  1;
  1,  7,  1, 19,  1, 11,  1,  1;
  ...

Crossrefs

Cf. A049310, A062114, A131325, A131326, A131327.

Sequence in context: A318933 A361239 A140334 * A371884 A079724 A289357

Adjacent sequences: A131321 A131322 A131323 * A131325 A131326 A131327

Keyword

nonn,tabl,more

Author

Gary W. Adamson, Jun 28 2007

Status

approved