A127953 Triangle, A097805 * A126615.

1, -2, 2, -2, -1, 3, -2, -4, 2, 4, -2, -7, -3, 7, 5, -2, -10, -12, 4, 14, 6, -2, -13, -25, -10, 20, 23, 7, -2, -16, -42, -40, 10, 48, 34, 8, -2, -19, -63, -91, -35, 63, 91, 47, 9, -2, -22, -88, -168, -140, 28, 168, 152, 62, 10

Offset

1,2

Comments

Row sums = (1, 0, 0, 0, ...).

Links

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

Formula

A097805 * A126615 as infinite lower triangular matrices.

Example

First few rows of the triangle:
   1;
  -2,   2;
  -2,  -1,   3;
  -2,  -4,   2,   4;
  -2,  -7,  -3,   7,  5;
  -2, -10, -12,   4, 14,  6;
  -2, -13, -25, -10, 20, 23, 7;
  ...

Crossrefs

Cf. A097805, A126615.

Sequence in context: A325034 A275853 A324100 * A260418 A280919 A209266

Adjacent sequences: A127950 A127951 A127952 * A127954 A127955 A127956

Keyword

tabl,sign

Author

Gary W. Adamson, Feb 09 2007

Status

approved