A127140 Square of triangle A127139, row sums = A101035.

1, -4, 1, -6, 0, 1, 4, -4, 0, 1, -10, 0, 0, 0, 1, 24, -6, -4, 0, 0, 1, -14, 0, 0, 0, 0, 0, 1, 0, 4, 0, -4, 0, 0, 0, 1, 9, 0, -6, 0, 0, 0, 0, 0, 1, 40, -10, 0, 0, -4, 0, 0, 0, 0, 1

Offset

1,2

Comments

Row sums = A101035: (1, -3, -5, 1, -9, 15, ...). A127140 * [1, 2, 3, ...] = A055615: (1, -2, -3, 0, -5, 6, -7, ...).

Links

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

Formula

Square of A127139.

Example

First few rows of the triangle:
    1;
   -4,  1;
   -6,  0,  1;
    4, -4,  0,  1;
  -10,  0,  0,  0, 1;
   24, -6, -4,  0, 0, 1;
  -14,  0,  0,  0, 0, 0, 1;
    0,  4,  0, -4, 0, 0, 0, 1;
    9,  0, -6,  0, 0, 0, 0, 0, 1;
  ...

Crossrefs

Cf. A127139, A101035, A055615.

Sequence in context: A197915 A205074 A210491 * A010642 A127168 A176216

Adjacent sequences: A127137 A127138 A127139 * A127141 A127142 A127143

Keyword

tabl,sign

Author

Gary W. Adamson, Jan 06 2007

Status

approved