OFFSET
1,3
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
MAPLE
remove(n -> isprime(n^3-n-1), [$0..1000]); # Robert Israel, Jul 14 2017
PROG
(PARI) isok(n) = !isprime(n^3-n-1); \\ Michel Marcus, Jul 14 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
Vincenzo Librandi, Jun 05 2010
EXTENSIONS
Checked by Jud McCranie, Jun 16 2010
0 and 1 added by R. J. Mathar, Jun 18 2010
STATUS
approved