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A067785
Numbers k such that prime(k)^3 == prime(k+1)^3 (mod k).
1
1, 2, 4, 7, 9, 18, 26, 79, 139, 219, 248, 657, 1505, 11246, 19999, 62608, 368172, 553598, 646926, 1241426, 1562457, 1568558, 5098990, 7889727, 12866334, 18941415, 24647857, 25355582, 25869571, 26114278, 40784906, 46699276, 53532458, 113309714, 230702738, 290702470
OFFSET
1,2
COMMENTS
a(17) > 10^5. - Michel Marcus, Nov 22 2013
PROG
(PARI) isok(n) = Mod(prime(n+1), n)^3 == Mod(prime(n), n)^3; \\ Michel Marcus, Nov 22 2013
CROSSREFS
Cf. A030078.
Sequence in context: A153776 A005625 A340989 * A059186 A034702 A325745
KEYWORD
nonn
AUTHOR
Benoit Cloitre, Feb 06 2002
EXTENSIONS
a(16) from Michel Marcus, Nov 22 2013
More terms from Jinyuan Wang, Apr 06 2020
STATUS
approved