1,1
All terms are even. There is no further term up to 10000. So the prime
corresponding to the next term if it exists has more than 50200 digits.
1 and 2 are the only known numbers n (up to 10000) such that prime(n)^n+n
is prime.
Table of n, a(n) for n=1..4.
prime(2)^2-2=3^2-2=7 is prime, so 2 is in the sequence.
Do[If[PrimeQ[Prime[n]^n-n], Print[n]], {n, 50000}]
Cf. A000040.
Sequence in context: A007346 A062247 A284951 * A084744 A122547 A152132
Adjacent sequences: A171258 A171259 A171260 * A171262 A171263 A171264
nonn
Farideh Firoozbakht, Dec 07 2009
approved
