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A157157
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Nonprime numbers containing equal number of odd nonprime digits and even prime digits.
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0
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12, 21, 92, 102, 120, 123, 124, 125, 126, 128, 132, 142, 152, 162, 172, 182, 201, 209, 210, 213, 214, 215, 216, 217, 218, 231, 249, 259, 261, 279, 289, 290, 294, 295, 296, 297, 298, 312, 321, 329, 392, 412, 429, 492, 512, 529, 592, 612, 621, 629, 692, 712
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Odd nonprime digits are 1 or 9 and even prime digit = 2.
The definition presumably implies that the number of odd nonprime digits and the number of even prime digits are both larger than zero. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 26 2009]
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CROSSREFS
| Cf. A141468.
Sequence in context: A085926 A071263 A137480 * A048344 A039402 A043225
Adjacent sequences: A157154 A157155 A157156 * A157158 A157159 A157160
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KEYWORD
| nonn,base,less
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AUTHOR
| Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Feb 24 2009
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EXTENSIONS
| Missing numbers added by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 26 2009
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