A128208 Inverse of number triangle A128210.

1, 1, 1, 0, 1, 1, 0, 0, 3, 1, 0, 0, 0, 5, 1, 0, 0, 0, 0, 11, 1, 0, 0, 0, 0, 0, 21, 1, 0, 0, 0, 0, 0, 0, 43, 1, 0, 0, 0, 0, 0, 0, 0, 85, 1, 0, 0, 0, 0, 0, 0, 0, 0, 171, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 341, 1

Offset: 0

Author

Paul Barry, Feb 19 2007

Keywords

• nonn
• tabl

Comments

Subdiagonal is A001045(n+1). Row sums are A128209.

Examples

			Triangle begins:
  1;
  1, 1;
  0, 1, 1;
  0, 0, 3, 1;
  0, 0, 0, 5,  1;
  0, 0, 0, 0, 11,  1;
  0, 0, 0, 0,  0, 21,  1;
  0, 0, 0, 0,  0,  0, 43,  1;
  0, 0, 0, 0,  0,  0,  0, 85,   1;
  0, 0, 0, 0,  0,  0,  0,  0, 171,   1;
  0, 0, 0, 0,  0,  0,  0,  0,   0, 341, 1;
  ...