A131416 - OEIS

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A131416

(A000012 * A002260) + (A002260 * A000012) - A000012.

1, 4, 3, 8, 8, 5, 13, 14, 12, 7, 19, 21, 20, 16, 9, 26, 29, 29, 26, 20, 11, 34, 38, 39, 37, 32, 24, 13, 43, 48, 50, 49, 45, 38, 28, 15, 53, 59, 62, 62, 59, 53, 44, 32, 17, 64, 71, 75, 76, 74, 69, 61, 50, 36, 19

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

OFFSET

1,2

COMMENTS

Left column = A034856: (1, 4, 8, 13, 19, 26, 34,...). Row sums = A127735: (1, 7, 21, 46, 85...).

LINKS

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

FORMULA

(A000012 * A002260) + (A002260 * A000012) - A000012; as infinite lower triangular matrices.

EXAMPLE

First few rows of the triangle are:

4, 3;

8, 8, 5;

13, 14, 12, 7;

19, 21, 20, 16, 9;

26, 29, 29, 26, 20, 11;

...

CROSSREFS

Cf. A002260, A034856, A127735, A000012.

Sequence in context: A116583 A196521 A021699 * A134390 A004125 A137924

Adjacent sequences: A131413 A131414 A131415 * A131417 A131418 A131419

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Jul 08 2007

STATUS

approved