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A133545 (A000012 * A007318 - A007318 * A000012) - A000012. 1
1, 3, 1, 6, 5, 1, 11, 12, 7, 1, 20, 24, 20, 9, 1, 37, 45, 45, 30, 11, 1, 70, 83, 91, 76, 42, 13, 1, 135, 154, 175, 168, 119, 56, 15, 1, 264, 290, 330, 344, 288, 176, 72, 17, 1, 521, 555, 621, 675, 633, 465, 249, 90, 19, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row sums = A133546: (1, 4, 12, 31, 74, 169,...). Left border = A006127: (1, 3, 6, 11, 20,...).

LINKS

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

FORMULA

(A000012 * A007318 - A007318 * A000012) - A000012 as infinite lower triangular matrices.

EXAMPLE

First few rows of the triangle are:

1;

3, 1;

6, 5, 1;

11, 12, 7, 1;

20, 24, 20, 9, 1;

37, 45, 45, 30, 11, 1;

70, 83, 91, 76, 42, 13, 1;

...

CROSSREFS

Cf. A000012, A007318, A133546, A006127.

Sequence in context: A258993 A109954 A153641 * A210214 A209149 A210602

Adjacent sequences:  A133542 A133543 A133544 * A133546 A133547 A133548

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Sep 15 2007

STATUS

approved

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Last modified June 21 23:05 EDT 2018. Contains 305646 sequences. (Running on oeis4.)