login
A133591
a(n) = ((p-1)^(p^2) + 1)/p^3 where p = prime(n).
3
19, 9007199254741, 392750863685502459010271914701912679
OFFSET
2,1
MATHEMATICA
Table[ ((Prime[n] - 1)^(Prime[n]^2) + 1)/Prime[n]^3, {n, 2, 10} ]
CROSSREFS
Subset of A137643.
Sequence in context: A347353 A128400 A211378 * A137643 A351570 A023921
KEYWORD
nonn,bref
AUTHOR
Alexander Adamchuk, Dec 27 2007
STATUS
approved