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A130128 A004736 * A130123. 3
1, 2, 2, 3, 4, 4, 4, 6, 8, 8, 5, 8, 12, 16, 16, 6, 10, 16, 24, 32, 32, 7, 12, 20, 32, 48, 64, 64, 8, 14, 24, 40, 64, 96, 128, 128, 9, 16, 28, 48, 80, 128, 192, 256, 256, 10, 18, 32, 56, 96, 160, 256, 384, 512, 512 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

row sums = A000295: (1, 4, 11, 26, 56, 120,...).

LINKS

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

FORMULA

A004736 * A130123 as infinite lower triangular matrices, where A004736 = [1; 2,1; 3,2,1;...] and A130123 is the 2^n transform (2^n in the right diagonal and the rest zeros).(2^n .

EXAMPLE

First few rows of the triangle are:

1;

2, 2;

3, 4, 4;

4, 6, 8, 8;

5, 8, 12, 16, 16;

6, 10, 16, 24, 32, 32;

7, 12, 20, 32, 48, 64, 64;

...

CROSSREFS

Cf. A004736, A130123, A000295.

Sequence in context: A070172 A273353 A259197 * A210556 A208914 A049980

Adjacent sequences:  A130125 A130126 A130127 * A130129 A130130 A130131

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, May 11 2007

STATUS

approved

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Last modified February 15 20:32 EST 2019. Contains 320138 sequences. (Running on oeis4.)