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A066208
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All primes that divide n are of the form p(2k-1), where p(k) is k-th prime.
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1
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2, 4, 5, 8, 10, 11, 16, 17, 20, 22, 23, 25, 31, 32, 34, 40, 41, 44, 46, 47, 50, 55, 59, 62, 64, 67, 68, 73, 80, 82, 83, 85, 88, 92, 94, 97, 100, 103, 109, 110, 115, 118, 121, 124, 125, 127, 128, 134, 136, 137, 146, 149, 155, 157, 160, 164, 166, 167, 170, 176, 179, 184
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| Harry J. Smith, Table of n, a(n) for n=1,...,1000
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EXAMPLE
| 20 is included because 20 = 2^2 * 5 = p(1)^2 * p(3) and 1 and 3 are both odd.
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PROG
| (PARI) { n=0; for (m=2, 10^9, f=factor(m); b=1; for(i=1, matsize(f)[1], if (primepi(f[i, 1])%2 == 0, b=0; break)); if (b, write("b066208.txt", n++, " ", m); if (n==1000, return)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Feb 06 2010]
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CROSSREFS
| Sequence in context: A190807 A102798 A004612 * A169743 A191986 A018699
Adjacent sequences: A066205 A066206 A066207 * A066209 A066210 A066211
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KEYWORD
| nonn
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AUTHOR
| Leroy Quet Dec 16 2001
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EXTENSIONS
| OFFSET changed from 0,1 to 1,1 by Harry J. Smith (hjsmithh(AT)sbcglobal.net), Feb 06 2010
a(61) and a(62) from Harry J. Smith (hjsmithh(AT)sbcglobal.net), Feb 06 2010
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