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A033932
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Least positive a(n) such that n!+a(n) is prime.
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5
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1, 1, 1, 1, 5, 7, 7, 11, 23, 17, 11, 1, 29, 67, 19, 43, 23, 31, 37, 89, 29, 31, 31, 97, 131, 41, 59, 1, 67, 223, 107, 127, 79, 37, 97, 61, 131, 1, 43, 97, 53, 1, 97, 71, 47, 239, 101, 233, 53, 83, 61, 271, 53, 71, 223, 71, 149, 107, 283, 293, 271, 769, 131, 271
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,5
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COMMENTS
| Conjecture: No term is a composite number. a(n)is a prime > 3*prime(k) where prime(k) < n = < prime(k+1). - Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 07 2004
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LINKS
| T. D. Noe, Table of n, a(n) for n=0..500
Index entries for sequences related to factorial numbers
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PROG
| (PARI) for(n=0, 70, k=1; while(!isprime(n!+k), k++); print1(k, ", "))
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CROSSREFS
| Cf. A033933.
Sequence in context: A078496 A114521 A159482 * A144186 A153979 A126992
Adjacent sequences: A033929 A033930 A033931 * A033933 A033934 A033935
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KEYWORD
| nice,nonn
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AUTHOR
| Jeff Burch (gburch(AT)erols.com)
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EXTENSIONS
| More terms from Jud McCranie (JudMcCranie(AT)ugaalum.uga.edu). a(21) onwards from wouter.meeussen(AT)pandora.be. Better description from Rick L. Shepherd (rshepherd2(AT)hotmail.com), Nov 06 2002
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