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A064937
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Nonprimes n such that gcd(n, prime(n)^2 - 1) is 1.
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1
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1, 25, 49, 55, 77, 119, 133, 143, 155, 161, 169, 185, 187, 203, 209, 217, 221, 235, 247, 275, 287, 289, 295, 301, 325, 329, 361, 365, 371, 377, 391, 403, 407, 415, 425, 427, 437, 451, 455, 469, 473, 485, 493, 497, 505, 511, 517, 527, 529, 539, 553, 559, 583
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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LINKS
| Harry J. Smith, Table of n, a(n) for n=1,...,1000
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MATHEMATICA
| Select[ Range[600], !PrimeQ[ # ] && GCD[ #, Prime[ # ]^2 - 1] == 1 & ]
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PROG
| (PARI) { n=0; for (m=1, 10^9, if (isprime(m), next); if (gcd(m, prime(m)^2 - 1) == 1, write("b064937.txt", n++, " ", m); if (n==1000, return)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Sep 30 2009]
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CROSSREFS
| Cf. A064830.
Sequence in context: A062058 A198591 A069063 * A091300 A112771 A181782
Adjacent sequences: A064934 A064935 A064936 * A064938 A064939 A064940
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KEYWORD
| easy,nonn
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AUTHOR
| Robert G. Wilson v (rgwv(AT)rgwv.com), Oct 26 2001
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