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A246489
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Duodecimal period of 1/(n-th prime) (0 by convention for the primes 2 and 3).
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3
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0, 0, 4, 6, 1, 2, 16, 6, 11, 4, 30, 9, 40, 42, 23, 52, 29, 15, 66, 35, 36, 26, 41, 8, 16, 100, 102, 53, 54, 112, 126, 65, 136, 138, 148, 150, 3, 162, 83, 172, 89, 90, 95, 24, 196, 66, 14, 222, 113, 114, 8, 119, 120, 125, 256, 131, 268, 54, 138, 280
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OFFSET
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1,3
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COMMENTS
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For p >= 5 (n >= 3): multiplicative order of 12 mod prime(n). - Joerg Arndt, Nov 15 2014
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LINKS
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FORMULA
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EXAMPLE
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For n=9, prime(9) = 23, 1/23 in base 12 is 0. 06316948421 06316948421 ..., which has period 11, so a(9) = 11.
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MAPLE
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with(numtheory):
a:= n-> `if`(n<3, 0, order(12, ithprime(n))):
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PROG
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(PARI) /* nonzero terms only: */
forprime(p=5, 10^3, print1(znorder(Mod(12, p)), ", ")); \\ Joerg Arndt, Nov 15 2014
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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