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A087763 Primes n such that 8^n-7^n is composite. 0
2, 3, 5, 13, 19, 23, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 83, 89, 97, 101, 103, 107, 109, 127, 137, 149, 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, 311, 313, 317 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..58.

PROG

(PARI) apmb(a, b, n) = { forprime(x=2, n, y=a^x-b^x; if(!ispseudoprime(y), print1(x", "); ) ) }

CROSSREFS

Sequence in context: A041385 A108282 A042047 * A104735 A157976 A155738

Adjacent sequences:  A087760 A087761 A087762 * A087764 A087765 A087766

KEYWORD

nonn

AUTHOR

Cino Hilliard (hillcino368(AT)gmail.com), Oct 26 2003

STATUS

approved

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Last modified May 25 02:28 EDT 2013. Contains 225634 sequences.