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A087894
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Primes n such that 9^n-8^n is composite.
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0
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3, 5, 11, 13, 17, 19, 23, 37, 41, 43, 47, 53, 59, 61, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307
(list; graph; refs; listen; history; internal format)
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OFFSET
| 2,1
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MATHEMATICA
| Select[Prime[Range[100]], !PrimeQ[9^#-8^#]&] (* From Harvey P. Dale, May 01 2011 *)
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PROG
| (PARI) apmb(a, b, n) = { forprime(x=2, n, y=a^x-b^x; if(!ispseudoprime(y), print1(x", "); ) ) }
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CROSSREFS
| Sequence in context: A020620 A136056 A059636 * A059352 A059309 A049233
Adjacent sequences: A087891 A087892 A087893 * A087895 A087896 A087897
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KEYWORD
| nonn
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AUTHOR
| Cino Hilliard (hillcino368(AT)gmail.com), Oct 26 2003
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