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A070295
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Smallest composite number such that there are exactly n primes less than it (and coprime to it) which do not divide it, or 0 if no such number exists.
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0
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4, 10, 8, 14, 16, 20, 24, 25, 33, 32, 0, 44, 48, 49, 66, 62, 64, 72, 74, 80, 81, 91, 98, 105, 104, 108, 111, 115, 121, 128, 140, 141, 154, 152, 158, 164, 171, 169, 182, 183, 192, 194, 204, 200, 212, 224, 230, 232, 235, 246, 242, 243, 256, 265, 273, 272, 278, 285
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Are there any zero values other than a(11) = 0?
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EXAMPLE
| a(4) = 14: primes up to 14 are 2, 3, 5, 7, 11, 13 out of which four primes 3, 5, 11 and 13 are coprime to 14.
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CROSSREFS
| Sequence in context: A129531 A014476 A080362 * A123483 A073722 A199805
Adjacent sequences: A070292 A070293 A070294 * A070296 A070297 A070298
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KEYWORD
| nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), May 10 2002
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EXTENSIONS
| Corrected and extended by Larry Reeves (larryr(AT)acm.org), Oct 01 2002
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