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Search: id:A104716
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| 1, 7, 3, 22, 13, 5, 50, 34, 19, 7, 95, 70, 46, 25, 9, 161, 125, 90, 58, 31, 11, 252, 203, 155, 110, 70, 37, 13
(list; table; graph; listen)
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OFFSET
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1,2
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COMMENT
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A104715 is derived from B * A. Row sums = A002419, (4-D figurate numbers): 1, 10, 40, 110, 245...
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FORMULA
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A * B, A = [1; 1, 3; 1, 3, 5;...]; B = [1; 2, 1;, 3, 2, 1...] both infinite lower triangular matrices, rest of the terms filled in with zeros. A104716 is extracted from the product as a triangle, read by rows.
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EXAMPLE
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First few rows are:
1;
7, 3;
22, 13, 5;
50, 34, 19, 7;
95, 70, 46, 25, 9;
...
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CROSSREFS
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Cf. A104715, A002419.
Sequence in context: A166481 A050012 A098231 this_sequence A002969 A104727 A116419
Adjacent sequences: A104713 A104714 A104715 this_sequence A104717 A104718 A104719
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KEYWORD
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nonn,tabl,uned
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Mar 20 2005
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