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A089173 Solutions x for x^4-1 = kp where p is prime and k=1,2... 0
2, 2, 4, 3, 6, 3, 5, 4, 4, 10, 9, 6, 14, 5, 11, 16, 6, 5, 8, 20, 15, 7, 24, 8, 26, 12, 19, 7, 8, 10 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..30.

PROG

(PARI) xpm1(n, m, pow) = { for(k=1, m, for(x=1, n, y= x^pow - 1; z=floor(y/k); if(floor(y/k)*k==y, if(isprime(z), print1(x", ") ) ) ) )

CROSSREFS

Sequence in context: A059975 A087656 A122811 * A126090 A058266 A138664

Adjacent sequences:  A089170 A089171 A089172 * A089174 A089175 A089176

KEYWORD

easy,nonn

AUTHOR

Cino Hilliard, Dec 07 2003

STATUS

approved

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Last modified August 28 10:57 EDT 2015. Contains 261120 sequences.