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Search: id:A131248
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| 1, 1, 1, 1, 3, 1, 1, 3, 5, 1, 1, 3, 7, 7, 1, 1, 3, 7, 13, 9, 1, 1, 3, 7, 15, 21, 11, 1, 1, 3, 7, 15, 29, 31, 13, 1, 1, 3, 7, 15, 31, 51, 43, 15, 1, 1, 3, 7, 15, 31, 61, 83, 57, 17, 1
(list; table; graph; listen)
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OFFSET
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0,5
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COMMENT
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Row sums = A104161: (1, 2, 5, 10, 19, 34, 59,...).
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FORMULA
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2*A004070 - A000012 as infinite lower triangular matrices. Reversal triangle of A131247, read by rows.
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EXAMPLE
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First few rows of the triangle are:
1;
1, 1;
1, 3, 1;
1, 3, 5, 1;
1, 3, 7, 7, 1;
1, 3, 7, 13, 9, 1;
1, 3, 7, 15, 21, 11, 1;
1, 3, 7, 15, 29, 31, 13, 1;
...
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CROSSREFS
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Cf. A004070, A000012, A104161, A131247.
Sequence in context: A124794 A097560 A027960 this_sequence A116445 A110291 A077308
Adjacent sequences: A131245 A131246 A131247 this_sequence A131249 A131250 A131251
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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), Jun 23 2007
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