A127474 Triangle, square of A054522.

1, 2, 1, 3, 0, 4, 4, 3, 0, 4, 5, 0, 0, 0, 16, 6, 3, 8, 0, 0, 4, 7, 0, 0, 0, 0, 0, 36, 8, 7, 0, 12, 0, 0, 0, 16, 9, 0, 16, 0, 0, 0, 0, 0, 36, 10, 5, 0, 0, 32, 0, 0, 0, 0, 16

Offset: 1

Author

Gary W. Adamson, Jan 15 2007

Keywords

• nonn
• tabl

Comments

Right border = A127473, squares of phi(n) terms. Row sums = A057660: (1, 3, 7, 11, 21, ...).

Examples

			First few rows of the triangle:
  1;
  2, 1;
  3, 0, 4;
  4, 3, 0,  4;
  5, 0, 0,  0, 16;
  6, 3, 8,  0,  0, 4;
  7, 0, 0,  0,  0, 0, 36;
  8, 7, 0, 12,  0, 0,  0, 16;
  ...
		

Crossrefs

Cf. A127473, A057660, A054522.

Formula

(A054522)^2 as an infinite lower triangular matrix.