A089173 Solutions x for x^4-1 = kp where p is prime and k=1,2...

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

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