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Search: id:A144693
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| 1, 2, 1, 3, 2, 4, 4, 3, 8, 7, 5, 4, 12, 14, 10, 6, 5, 16, 21, 20, 13, 7, 6, 20, 28, 30, 26, 16, 8, 7, 24, 35, 40, 39, 32, 19, 9, 8, 28, 42, 50, 52, 48, 38, 22, 10, 9, 32, 49, 60, 65, 64, 57, 44, 25, 11, 10, 36, 56, 70, 78, 80, 76, 66, 50, 28
(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 = A064808: (1, 3, 9, 22, 45, 81, 133,...).
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FORMULA
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Triangle read by rows, A000012 * (3*A144328 - 2*A000012)
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EXAMPLE
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Partial sums by columns of the triangle (3*A144328 - 2*A000012):
1;
1, 1;
1, 1, 4;
1, 1, 4, 7;
1, 1, 4, 7, 10;
...
First few rows of the triangle =
1;
2, 1
3, 2, 4;
4, 3, 8, 7;
5, 4, 12, 14, 10;
6, 5, 16, 21, 20, 13;
7, 6, 20, 28, 30, 26, 16;
8, 7, 24, 35, 40, 39, 32, 19;
...
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CROSSREFS
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A144328, Cf. A064808
Sequence in context: A029140 A008584 A034390 this_sequence A029139 A100927 A001687
Adjacent sequences: A144690 A144691 A144692 this_sequence A144694 A144695 A144696
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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), Sep 19 2008
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