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Search: id:A140704
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| 1, 4, 1, 4, 1, 1, 10, 4, 1, 1, 4, 1, 1, 1, 1, 16, 7, 4, 1, 1, 1, 4, 1, 1, 1, 1, 1, 1, 20, 10, 4, 4, 1, 1, 1, 1, 10, 4, 4, 1, 1, 1, 1, 1, 1, 16, 7, 4, 4, 4, 1, 1, 1, 1, 1, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 40, 22, 13, 7, 4, 4, 1, 1, 1, 1, 1, 1
(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 = A007430: (1, 5, 6, 16, 8, 30, 10,...).
Left column = A007426: (1, 4, 4, 10, 4, 16, 4,...).
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FORMULA
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A051731^3 * A000012 as infinite lower triangular matrices, where A051731 = the inverse Mobius transform and A000012 an infinite lower triangular matrix with all 1's.
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EXAMPLE
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First few rows of the triangle are:
1;
4, 1;
4, 1, 1;
10, 4, 1, 1;
4, 1, 1, 1, 1;
16, 7, 4, 1, 1, 1;
4, 1, 1, 1, 1, 1, 1;
20, 10, 4, 4, 1, 1, 1, 1;
10, 4, 4, 1, 1, 1, 1, 1, 1;
...
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CROSSREFS
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Cf. A051731, A007430, A007426.
Sequence in context: A082999 A010641 A100086 this_sequence A030748 A096622 A080905
Adjacent sequences: A140701 A140702 A140703 this_sequence A140705 A140706 A140707
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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 24 2008
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