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A046442
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Semiprimes whose two prime factors are distinct in length.
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1
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22, 26, 33, 34, 38, 39, 46, 51, 55, 57, 58, 62, 65, 69, 74, 77, 82, 85, 86, 87, 91, 93, 94, 95, 106, 111, 115, 118, 119, 122, 123, 129, 133, 134, 141, 142, 145, 146, 155, 158, 159, 161, 166, 177, 178, 183, 185, 194, 201, 202, 203, 205, 206, 213, 214, 215, 217
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| E.g. 203 because 203 = 7 * 29 = (1)(2).
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MATHEMATICA
| Take[Union[Times@@@Select[Subsets[Prime[Range[50]], {2}], IntegerLength[#[[1]]]!=IntegerLength[#[[2]]]&]], 60]
[From Harvey P. Dale, Dec. 29, 2010]
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CROSSREFS
| Sequence in context: A084891 A162422 A063940 * A101549 A172053 A038355
Adjacent sequences: A046439 A046440 A046441 * A046443 A046444 A046445
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KEYWORD
| nonn,base
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AUTHOR
| Patrick De Geest (pdg(AT)worldofnumbers.com), Jul 15 1998.
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