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1, 3, 3, 6, 5, 6, 10, 8, 9, 10, 15, 12, 13, 14, 15, 21, 17, 18, 19, 20, 21, 28, 23, 24, 25, 26, 27, 28, 36, 30, 31, 32, 33, 34, 35, 36, 45, 38, 39, 40, 41, 42, 43, 44, 45, 55, 47, 48, 49, 50, 51, 52, 53, 54, 55
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Row sums = A132127: (1, 6, 17, 37, 69, 116,...).
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EXAMPLE
| First few rows of the triangle are:
1;
3, 3;
6, 5, 6;
10, 8, 9, 10;
15, 12, 13, 14, 15;
21, 17, 18, 19, 20, 21;
...
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CROSSREFS
| Cf. A002260, A000027, A000012, A132127.
Sequence in context: A163926 A050346 A142149 * A180681 A023822 A071047
Adjacent sequences: A132116 A132117 A132118 * A132120 A132121 A132122
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KEYWORD
| nonn,tabl
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AUTHOR
| Gary W. Adamson (qntmpkt(AT)yahoo.com), Aug 10 2007
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