A131376 - OEIS

A131376

A007318 + A065941 - A168561.

1, 2, 1, 1, 3, 1, 2, 2, 5, 1, 1, 5, 6, 6, 1, 2, 3, 14, 9, 8, 1, 1, 7, 14, 24, 16, 9, 1, 2, 4, 27, 30, 45, 21, 11, 1, 1, 9, 25, 62, 70, 66, 31, 12, 1, 2, 5, 44, 71, 147, 120, 104, 38, 14, 1

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OFFSET

0,2

COMMENTS

The old definition was: A007318 + A065941 - A049310. - N. J. A. Sloane, Aug 09 2019

Row sums = A117591: (1, 3, 5, 10, 19, 37, 72,...).

LINKS

Table of n, a(n) for n=0..54.

FORMULA

A007318 + A065941 - A168561 as infinite lower triangular matrices.

EXAMPLE

First few rows of the triangle are:

2, 1;

1, 3, 1;

2, 2, 5, 1;

1, 5, 6, 6, 1;

2, 3, 14, 9, 8, 1;

1, 7, 14, 24, 16, 9, 1;

...

CROSSREFS

Cf. A007318, A065941, A049310, A117591, A131375, A168561, A309213.

Sequence in context: A357217 A353595 A317086 * A025840 A188542 A029284

Adjacent sequences: A131373 A131374 A131375 * A131377 A131378 A131379

KEYWORD

nonn,tabl,more

AUTHOR

Gary W. Adamson, Jul 04 2007

EXTENSIONS

The old definition of A131376 did not match its data, as Michel Marcus pointed out. The definition has been corrected here, keeping the data. The old definition with corrected data is now A309213. - N. J. A. Sloane, Aug 09 2019

STATUS

approved