A132071 - OEIS

A132071

A007318 + A002024 - A103451 as infinite lower triangular matrices.

1, 2, 2, 3, 5, 3, 4, 7, 7, 4, 5, 9, 11, 9, 5, 6, 11, 16, 16, 11, 6, 7, 13, 22, 27, 22, 13, 7, 8, 15, 29, 43, 43, 29, 15, 8, 9, 17, 37, 65, 79, 65, 37, 17, 9, 10, 19, 46, 94, 136, 136, 94, 46, 19, 10

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OFFSET

0,2

COMMENTS

Row sums = A132072: (1, 4, 11, 22, 39, 66, 111, ...).

LINKS

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

EXAMPLE

First few rows of the triangle:

2, 2;

3, 5, 3;

4, 7, 7, 4;

5, 9, 11, 9, 5;

6, 11, 16, 16, 11, 6;

7, 13, 22, 27, 22, 13, 7;

...

CROSSREFS

Cf. A007318, A002024, A103451, A132072.

Sequence in context: A204012 A131901 A204000 * A334923 A061177 A129312

Adjacent sequences: A132068 A132069 A132070 * A132072 A132073 A132074

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Aug 09 2007

STATUS

approved