A134513 - OEIS

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A134513

A049310 * A097806.

1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 3, 3, 1, 1, 3, 3, 4, 4, 1, 1, 1, 6, 6, 5, 5, 1, 1, 4, 4, 10, 10, 6, 6, 1, 1, 1, 10, 10, 15, 15, 7, 7, 1, 1, 5, 5, 20, 20, 21, 21, 8, 8, 1, 1

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

OFFSET

1,7

COMMENTS

Row sums = A062114: (1, 2, 3, 6, 9, 16, 25, 42, 67, ...).

Triangle A046854 = A097806 * A049310.

LINKS

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

FORMULA

A049310 * A097806 as infinite lower triangular matrices.

EXAMPLE

First few rows of the triangle:

1, 1;

1, 1, 1;

2, 2, 1, 1;

1, 3, 3, 1, 1;

3, 3, 4, 4, 1, 1;

1, 6, 6, 5, 5, 1, 1;

4, 4, 10, 10, 6, 6, 1, 1;

1, 10, 10, 15, 15, 7, 7, 1, 1;

...

CROSSREFS

Cf. A097806, A062114, A049310.

Sequence in context: A058914 A238585 A123682 * A275648 A201881 A291120

Adjacent sequences: A134510 A134511 A134512 * A134514 A134515 A134516

KEYWORD

nonn,tabl,more

AUTHOR

Gary W. Adamson, Oct 28 2007

STATUS

approved