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

0,9

Comments

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

Links

Table of n, a(n) for n=0..65.

Example

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;
  ...

Crossrefs

Sequence in context: A058612 A099725 A285118 * A154721 A350449 A185664

Adjacent sequences: A128205 A128206 A128207 * A128209 A128210 A128211

Keyword

nonn,tabl

Author

Paul Barry, Feb 19 2007

Status

approved