A131778 6*A065941 - 5*A049310.

1, 6, 1, 1, 6, 1, 6, -4, 12, 1, 1, 6, 3, 12, 1, 6, -9, 24, -2, 18, 1, 1, 6, 0, 24, 11, 18, 1, 6, -14, 36, -20, 60, 6, 24, 1, 1, 6, -8, 36, 15, 60, 25, 24, 1, 6, -19, 48, -58, 126, -15, 120, 20, 30, 1

Offset

1,2

Comments

Row sums = A022097, a Fibonacci-like sequence starting (1, 7, 8, 15, 23, 38, ...).

Links

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

Formula

6*A065941 - 5*A049310 as infinite lower triangular matrices.

Example

First few rows of the triangle:
  1;
  6,  1;
  1,  6,  1;
  6, -4, 12,  1;
  1,  6,  3, 12,  1;
  6, -9, 24, -2, 18,  1;
  1,  6,  0, 24, 11, 18,  1;
  ...

Crossrefs

Cf. A065941, A049310, A099097, A131774, A131775, A131776, A131777.

Sequence in context: A195385 A319990 A138073 * A095713 A138072 A176348

Adjacent sequences: A131775 A131776 A131777 * A131779 A131780 A131781

Keyword

tabl,sign

Author

Gary W. Adamson, Jul 14 2007

Status

approved