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A155474
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Odd nonprimes n with distinct smallest digits of n and n-th prime.
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0
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1, 9, 15, 21, 25, 27, 33, 35, 39, 45, 49, 51, 55, 57, 63, 65, 69, 75, 77, 85, 87, 91, 93, 95, 99, 105, 111, 117, 119, 123, 129, 143, 145, 147, 153, 155, 159, 161, 165, 169, 171, 175, 177, 183, 185, 201, 203, 205, 207, 209, 213, 225, 235, 237, 243, 245, 247, 249, 253
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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EXAMPLE
| If n=1=odd nonprime and 2=prime(1), then 1<2 and 1=a(1). If n=9=odd nonprime and 23=prime(9), then 9>2 and 9=a(2). If n=15=odd nonprime and 47=prime(15), then 1<4 and 15=a(3), etc.
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CROSSREFS
| Cf. A000027, A000040, A014076.
Sequence in context: A071904 A014076 A067800 * A100819 A046446 A046350
Adjacent sequences: A155471 A155472 A155473 * A155475 A155476 A155477
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KEYWORD
| nonn,base
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AUTHOR
| Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jan 23 2009
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EXTENSIONS
| Corrected (89 removed) by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 10 2010
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