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Search: id:A104715
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| 1, 3, 3, 6, 9, 5, 10, 18, 15, 7, 15, 30, 30, 21, 9, 21, 45, 50, 42, 27, 11, 28, 63, 70, 70, 54, 33, 13, 36, 84, 105, 105, 90, 66, 39, 15
(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 = 1, 6, 20, 50, 105, 196...(A002415, 4-D pyramidal numbers).
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FORMULA
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n-th column (offset) = (2n - 1) * (1, 3, 6, 10...); n = 1, 2, 3...
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EXAMPLE
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First few rows are:
1;
3, 3;
6, 9, 5;
10, 18, 15, 7;
15, 30, 30, 21, 9;
21, 45, 50, 42, 27, 11;
...
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CROSSREFS
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Cf. A002415, A104716.
Sequence in context: A143592 A097307 A026804 this_sequence A164743 A110769 A093445
Adjacent sequences: A104712 A104713 A104714 this_sequence A104716 A104717 A104718
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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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