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A066646
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Arrange the permutations of {1...m} in lexicographic order. Sequence gives indices of permutations of orders 1 or 2.
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1, 2, 3, 6, 7, 8, 15, 17, 22, 24, 25, 26, 27, 30, 55, 56, 61, 68, 81, 83, 87, 95, 106, 108, 112, 120, 121, 122, 123, 126, 127, 128, 135, 137, 142, 144, 265, 266, 267, 270, 289, 290, 315, 317, 340, 342, 391, 392, 397, 404, 415, 416, 445, 451, 470, 476, 513, 515
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Independent of choice of m as long as m! exceeds index.
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EXAMPLE
| Take m=4, say. The first few permutations are 1234, 1243, 1324, 1342, 1423, 1432, 2134, 2143, 2314, ... and numbers 1,2,3,6,7,8,... have orders 1 or 2. This gives the first 6 terms.
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CROSSREFS
| Sequence in context: A127330 A035346 A030164 * A110920 A145266 A188078
Adjacent sequences: A066643 A066644 A066645 * A066647 A066648 A066649
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KEYWORD
| easy,nice,nonn
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AUTHOR
| Ian Lawrence Mooney (ian.mooney(AT)vu.edu.au), Jan 09 2002
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