A133116 - OEIS

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

(list; table; graph; refs; listen; history; text; internal format)

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;

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