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Search: id:A104731
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| 1, 1, 2, 1, 5, 3, 1, 5, 11, 4, 1, 5, 16, 19, 5, 1, 5, 16, 37, 29, 6, 1, 5, 16, 44, 71, 41, 7, 1, 5, 16, 44, 103, 121, 55, 8
(list; table; graph; listen)
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OFFSET
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1,3
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FORMULA
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The triangle extracted from A * B, A = [1; 1, 2; 1, 2, 3;...]; B = [1; 0, 1; 0, 1, 1; 0, 0, 2, 1; 0, 0, 1, 3, 1;...]; both infinite lower triangular matrices with the rest of the terms zeros. (1, 0, 1, 0, 1, 1, 0, 0, 2, 1...the sequence in B, = A026729).
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EXAMPLE
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The first few rows of the triangle are:
1;
1, 2;
1, 5, 3;
1, 5, 11, 4
1, 5, 16, 19, 5;
1, 5, 16, 37, 29, 6;
...
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CROSSREFS
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Cf. A014286, A045925, A026729.
Sequence in context: A115345 A140165 A141483 this_sequence A105728 A120095 A130197
Adjacent sequences: A104728 A104729 A104730 this_sequence A104732 A104733 A104734
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KEYWORD
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nonn,uned,tabl
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Mar 20 2005
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