A131776 4*A065941 - 3*A049310.

1, 4, 1, 1, 4, 1, 4, -2, 8, 1, 1, 4, 3, 8, 1, 4, -5, 16, 0, 12, 1, 1, 4, 2, 16, 9, 12, 1, 4, -8, 24, -10, 40, 6, 16, 1, 1, 4, -2, 24, 15, 40, 19, 16, 1, 4, -11, 32, -32, 84, -3, 80, 16, 20, 1

Offset

1,2

Comments

Row sums = A022095, a Fibonacci-like sequence starting (1, 5, 6, 11, 17, 28, ...).

Links

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

Formula

4*A065941 - 3*A049310 as infinite lower triangular matrices.

Example

First few rows of the triangle:
  1;
  4,  1;
  1,  4,  1;
  4, -2,  8,  1;
  1,  4,  3,  8,  1;
  4, -5, 16,  0, 12,  1;
  1,  4,  2, 16,  9, 12,  1;
  ...

Crossrefs

Cf. A065941, A049310, A022095, A131774, A131775, A131777, A131778.

Sequence in context: A080278 A258328 A070085 * A010322 A299537 A053239

Adjacent sequences: A131773 A131774 A131775 * A131777 A131778 A131779

Keyword

tabl,sign

Author

Gary W. Adamson, Jul 14 2007

Status

approved