A133116 2*A133114 - A000012.

1, 1, 1, 3, 1, 1, 3, 3, 5, 1, 5, 3, 13, 5, 1, 5, 5, 25, 13, 9, 1, 7, 5, 43, 25, 31, 9, 1, 7, 7, 67, 43, 79, 31, 13, 1, 9, 7, 99, 67, 171, 79, 57, 13, 1, 9, 9, 139, 99, 331, 171, 181, 57, 17, 1

Offset

2,4

Comments

Row sums = A000325, 2^n - n: (1, 2, 5, 12, 27, 58, 121, ...).

Links

Table of n, a(n) for n=2..56.

Formula

2*A133114 - A000012 as infinite lower triangular matrices.

Example

First few rows of the triangle:
  1;
  1,  1;
  3,  1,  1;
  3,  3,  5,  1;
  5,  3, 13,  5,  1;
  5,  5, 25, 13,  9,  1;
  7,  5, 43, 25, 31,  9,  1;
  7,  7, 67, 43, 79, 31, 13,  1;
  ...

Crossrefs

Cf. A133114, A000012.

Sequence in context: A060592 A080426 A230293 * A059959 A192812 A125127

Adjacent sequences: A133113 A133114 A133115 * A133117 A133118 A133119

Keyword

nonn,tabl

Author

Gary W. Adamson, Sep 14 2007

Status

approved