

A070295


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.


0



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
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OFFSET

1,1


COMMENTS

Are there any zero values other than a(11) = 0?


LINKS



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.


CROSSREFS



KEYWORD

nonn


AUTHOR



EXTENSIONS

Corrected and extended by Larry Reeves (larryr(AT)acm.org), Oct 01 2002


STATUS

approved



