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Search: id:A130128
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| 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; listen)
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OFFSET
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1,2
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COMMENT
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row sums = A000295: (1, 4, 11, 26, 56, 120,...).
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FORMULA
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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 .
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EXAMPLE
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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;
...
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CROSSREFS
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Cf. A004736, A130123, A000295.
Sequence in context: A131807 A104351 A070172 this_sequence A049980 A071475 A112778
Adjacent sequences: A130125 A130126 A130127 this_sequence A130129 A130130 A130131
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KEYWORD
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nonn,tabl
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), May 11 2007
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