A133571 - OEIS

A133571

(A007318 * A133080 + A133080 * A007318) - A007318.

1, 3, 1, 3, 2, 1, 5, 5, 5, 1, 5, 4, 10, 4, 1, 7, 9, 26, 14, 7, 1, 7, 6, 35, 20, 21, 6, 1, 9, 13, 71, 55, 71, 27, 9, 1, 9, 8, 84, 56, 126, 56, 36, 8, 1, 11, 17, 148, 140, 322, 182, 14844, 11, 1

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

OFFSET

1,2

COMMENTS

Row sums = A133572: (1, 4, 6, 16, 24, 64, 96, 256, ...).

LINKS

Table of n, a(n) for n=1..54.

FORMULA

(A007318 * A133080 + A133080 * A007318) - A007318, as infinite lower triangular matrices, where A133080 is an interpolation operator.

EXAMPLE

First few rows of the triangle:

3, 1;

3, 2, 1;

5, 5, 5, 1;

5, 4, 10, 4, 1;

7, 9, 26, 14, 7, 1;

7, 6, 35, 20, 21, 6, 1;

9, 13, 71, 55, 71, 27, 9, 1;

...

CROSSREFS

Cf. A133080, A133572.

Sequence in context: A243848 A271617 A057741 * A357059 A326420 A171899

Adjacent sequences: A133568 A133569 A133570 * A133572 A133573 A133574

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Sep 16 2007

STATUS

approved