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A078788
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Smallest m such that (n-1)*m+1 mod n = 0, or 0 if no such number exists.
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0
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0, 0, 3, 0, 5, 3, 7, 0, 3, 5, 11, 3, 13, 7, 3, 0, 17, 3, 19, 5, 3, 11, 23, 3, 5, 13, 3, 7, 29, 3, 31, 0, 3, 17, 5, 3, 37, 19, 3, 5, 41, 3, 43, 11, 3, 23, 47, 3, 7, 5, 3, 13, 53, 3, 5, 7, 3, 29, 59, 3, 61, 31, 3, 0, 5, 3, 67, 17, 3, 5, 71, 3, 73, 37, 3, 19, 7, 3, 79, 5, 3, 41, 83, 3, 5, 43, 3, 11
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| Terms are primes or 0.
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EXAMPLE
| a(5) is representing 11. 11*(3-1)+1=23=2 mod 3, 11*(5-1)+1=45=0 mod 5, hence a(5)=5
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PROG
| (PARI) forstep (m=3, 1000, 2, forstep (n=3, 1000, 2, if (((n-1)*m+1)%n==0, print1(n", "); break); if (n==999, print1("0, "))))
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CROSSREFS
| Sequence in context: A179179 A108500 A076109 * A005069 A037284 A002123
Adjacent sequences: A078785 A078786 A078787 * A078789 A078790 A078791
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KEYWORD
| nonn
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AUTHOR
| Jon Perry (perry(AT)globalnet.co.uk), Jan 10 2003
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