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A134390 (A000012 * A002260 + A002260 * A000012) - A000012. 1
1, 4, 3, 8, 8, 3, 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, 5344, 32, 17, 64, 71, 75, 76, 64, 69, 61, 50, 36, 19 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row sums = A127736: (1, 7, 21, 46, 85, 141, 217,...).

LINKS

Table of n, a(n) for n=1..54.

FORMULA

(A000012 * A002260 + A002260 * A000012) - A000012 as infinite lower triangular matrices; where A000012 = (1; 1,1; 1,1,1;...) and A002260 = (1; 1,2; 1,2,3;...).

EXAMPLE

First few rows of the triangle are:

1;

4, 3;

8, 8, 5;

13, 14, 12, 7;

19, 21, 20, 16, 9;

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

...

CROSSREFS

Cf. A002260, A127736.

Sequence in context: A089368 A116583 A196521 * A021699 A131416 A004125

Adjacent sequences:  A134387 A134388 A134389 * A134391 A134392 A134393

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Oct 23 2007

STATUS

approved

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Last modified August 10 14:50 EDT 2020. Contains 336381 sequences. (Running on oeis4.)