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A054461 Primes of the form (n+1)^n + n^(n-1), n >= 1. 0

%I

%S 3,11,73,45143873,1043046721,1182114430632237601,49814113380273715457

%N Primes of the form (n+1)^n + n^(n-1), n >= 1.

%C Sum of reciprocals (omitting the 3) = 0.1046077441562072936197025883... Next term for n=219 is too large for the database.

%C Generated by n= 1, 2, 3, 8, 9, 15, 16, 219, ...

%o (PARI) xp1toxm1(n)= { forstep(x=2,n,1, y=(x+1)^x + x^(x-1); if(isprime(y),print1(y" ")) ) }

%K nonn

%O 1,1

%A _Cino Hilliard_, Aug 30 2003

%E Leading prime 3 added by Michel Lagneau, Nov 17 2010

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Last modified July 22 19:50 EDT 2014. Contains 244836 sequences.