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Search: id:A128971
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| 1, 2, 2, 5, 4, 4, 10, 10, 8, 8, 21, 20, 20, 16, 16, 42, 42, 40, 40, 32, 32, 85, 84, 84, 80, 80, 64, 64, 170, 170, 168, 168, 160, 160, 128
(list; table; graph; listen)
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OFFSET
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0,2
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COMMENT
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Left column = A000975: (1, 2, 5, 10, 21, 42,...). Row sums = A102301: (1, 4, 13, 36, 93,...). A130127 = A000012 * A130125.
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FORMULA
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A130125 * A000012 as infinite lower triangular matrices.
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EXAMPLE
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First few rows of the triangle are:
1;
2, 2;
5, 4, 4;
10, 10, 8, 8;
21, 20, 20, 16, 16;
42, 42, 40, 40, 32, 32;
85, 84, 84, 80, 80, 64, 64;
...
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CROSSREFS
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Cf. A000975, A102301, A130127, A000012, A130125.
Sequence in context: A135281 A068465 A025498 this_sequence A112923 A098366 A162200
Adjacent sequences: A128968 A128969 A128970 this_sequence A128972 A128973 A128974
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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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