A131333 - OEIS

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A131333

A131332 * A000012.

1, 1, 1, 2, 1, 1, 3, 2, 2, 1, 5, 3, 4, 2, 1, 8, 5, 7, 4, 3, 1, 13, 8, 12, 7, 7, 3, 1, 21, 13, 20, 12, 14, 7, 4, 1, 34, 21, 33, 20, 26, 14, 11, 4, 1, 55, 34, 54, 33, 46, 26, 25, 11, 5, 1

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OFFSET

1,4

COMMENTS

Leftmost two columns = Fibonacci numbers. Row sums = A029907: (1, 2, 4, 8, 15, 28, 51,...).

LINKS

Table of n, a(n) for n=1..55.

FORMULA

A131332 * A000012, where A000012 = (1; 1,1; 1,1,1;...). Partial sums of A131332 rows starting from the right.

EXAMPLE

First few rows of the triangle are:

1, 1;

2, 1, 1;

3, 2, 2, 1;

5, 3, 4, 2, 1;

8, 5, 7, 4, 3, 1;

13, 8, 12, 7, 7, 3, 1;

21, 13, 20, 12, 14, 7, 4, 1;

...

CROSSREFS

Cf. A131332, A131334, A131335, A131336.

Sequence in context: A211161 A348687 A208101 * A120643 A242628 A111867

Adjacent sequences: A131330 A131331 A131332 * A131334 A131335 A131336

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Jun 29 2007

STATUS

approved