A134575 A051731 * A127733.

1, 1, 4, 1, 0, 9, 1, 4, 0, 16, 1, 0, 0, 0, 25, 1, 4, 9, 0, 0, 36, 1, 0, 0, 0, 0, 0, 49, 1, 4, 0, 16, 0, 0, 0, 64, 1, 0, 9, 0, 0, 0, 0, 0, 81, 1, 4, 0, 0, 25, 0, 0, 0, 0, 100

Offset

1,3

Comments

Row sums = A001157: (1, 5, 10, 21, 26, 25, 50, 50, ...).

Links

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

Formula

A051731 * A127733 as infinite lower triangular matrices.

Example

First few rows of the triangle:
  1;
  1,  4;
  1,  0,  9;
  1,  4,  0, 16;
  1,  0,  0,  0, 25;
  1,  4,  9,  0,  0, 36;
  1,  0,  0,  0,  0,  0, 49;
  ...

Crossrefs

Cf. A051731, A127733, A001157.

Sequence in context: A231350 A152420 A050465 * A095831 A277531 A284982

Adjacent sequences: A134572 A134573 A134574 * A134576 A134577 A134578

Keyword

nonn,tabl

Author

Gary W. Adamson, Nov 02 2007

Status

approved