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Search: id:A131307
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| 1, 2, 3, 3, 2, 5, 4, 5, 2, 7, 5, 4, 7, 2, 9, 6, 7, 4, 9, 2, 11, 7, 6, 9, 4, 11, 2, 13, 8, 9, 6, 11, 4, 13, 2, 15, 9, 8, 11, 6, 13, 4, 15, 2, 17, 10, 11, 8, 13, 6, 15, 4, 17, 2, 19
(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 = A035608: (1, 5, 10, 18, 27, 39, 52,...).
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FORMULA
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(A127701 * A000012 + A000012(signed) * A127701) - A000012; as infinite lower triangular matrices; where A000012(signed) = (1; -1,1; 1,-1,1; -1,1,-1,1;...).
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EXAMPLE
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First few rows of the triangle are:
1;
2, 3;
3, 2, 5;
4, 5, 2, 7;
5, 4, 7, 2, 9;
6, 7, 4, 9, 2, 11;
7, 6, 9, 4, 11, 2, 13;
8, 9, 6, 11, 4, 13, 2, 15;
9, 8, 11, 6, 13, 4, 15, 2, 17;
10, 11, 8, 13, 6, 15, 4, 17, 2, 19;
...
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CROSSREFS
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Cf.1 A000012, A127701, A035608.
Sequence in context: A138652 A131899 A095174 this_sequence A091813 A023139 A118925
Adjacent sequences: A131304 A131305 A131306 this_sequence A131308 A131309 A131310
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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 30 2007
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