A131775 3*A065941 - 2*A049310.

1, 3, 1, 1, 3, 1, 3, -1, 6, 1, 1, 3, 3, 6, 1, 3, -3, 12, 1, 9, 1, 1, 3, 3, 12, 8, 9, 1, 3, -5, 18, -5, 30, 6, 12, 1, 1, 3, 1, 18, 15, 30, 16, 12, 1, 3, -7, 24, -19, 63, 3, 60, 14, 15, 1

Offset

1,2

Comments

Row sums = A000285, (a Fibonacci-like sequence) starting (1, 4, 5, 9, 14, 23, ...).

Links

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

Formula

3*A065941 - 2*A049310.

Example

Table begins:
  1;
  3,  1;
  1,  3,  1;
  3, -1,  6,  1;
  1,  3,  3,  6,  1;
  3, -3, 12,  1,  9,  1;
  1,  3,  3, 12,  8,  9,  1;
  3, -5, 18, -5, 30,  6, 12,  1;
  1,  3,  1, 18, 15, 30, 16, 12,  1;
  ...

Crossrefs

Cf. A065941, A049310, A131774, A131776, A131777, A131778.

Sequence in context: A133705 A046111 A131779 * A218825 A035691 A131781

Adjacent sequences: A131772 A131773 A131774 * A131776 A131777 A131778

Keyword

tabl,sign

Author

Gary W. Adamson, Jul 14 2007

Status

approved