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Search: id:A131784
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| 1, 5, 2, 11, 7, 3, 19, 14, 9, 4, 29, 23, 17, 11, 5, 41, 34, 27, 20, 13, 6, 55, 47, 39, 31, 23, 15, 7, 71, 62, 53, 44, 35, 26, 27, 8, 89, 79, 69, 59, 49, 39, 29, 19, 9, 109, 98, 87, 76, 65, 54, 43, 32, 21, 10
(list; table; graph; listen)
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OFFSET
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1,2
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COMMENT
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Left column = A028387: (1, 5, 11, 19, 29, 41, 55,...). Row sums = A127736: (1, 7, 21, 46, 85, 141,...).
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FORMULA
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(A004736 + A002260 - I) * A000012, I = Identity matrix.
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EXAMPLE
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First few rows of the triangle are:
1;
5, 2;
11, 7, 3;
19, 14, 9, 4;
29, 23, 17, 11, 5;
41, 34, 27, 20, 13, 6;
55, 47, 39, 31, 23, 15, 7;
...
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CROSSREFS
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Cf. A004736, A002260, A127736, A028387.
Sequence in context: A095396 A051308 A074642 this_sequence A065268 A130298 A128116
Adjacent sequences: A131781 A131782 A131783 this_sequence A131785 A131786 A131787
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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), Jul 16 2007
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