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A128543 Row sums of A128542. +0
2
1, 6, 18, 48, 120, 288, 672, 1536, 3456, 7680 (list; graph; listen)
OFFSET

1,2

FORMULA

Row sums of A128542, binomial transform of A007310.

Row sums of triangle A134239 - Gary W. Adamson (qntmpkt(AT)yahoo.com), Oct 14 2007

EXAMPLE

A128543 can be generated by taking addition rows of A007310:

1....6....18....48...

..5....12...30...

.....7....18...

........11...;

..where A007310 = (1, 5, 7, 11, 13,...); numbers congruent to 1 or 5 mod 6.

Or, by the binomial transform operation, a(4) = 48 = 1*1 + 3*5 + 3*7 + 1*11 = (1 + 15 + 21 + 11).

CROSSREFS

Cf. A128542, A007310.

Cf. A134239.

Sequence in context: A136028 A083719 A095170 this_sequence A003202 A003198 A099857

Adjacent sequences: A128540 A128541 A128542 this_sequence A128544 A128545 A128546

KEYWORD

nonn

AUTHOR

Gary W. Adamson (qntmpkt(AT)yahoo.com), Mar 10 2007

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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