%I #13 Jun 29 2018 02:13:48
%S 1,5,73,1569,108833,4036801,314563713,15846654977,1480518105601,
%T 327498647221249,26675231740370945,5516343830694027265,
%U 864423963230785470465,86799898084959301255169
%N a(n) = Sum_{k=1..n} (prime(k) - 1)^n.
%H Harry J. Smith, <a href="/A062440/b062440.txt">Table of n, a(n) for n = 1..100</a>
%e a(4)=1569 because 1^4 + 2^4 + 4^4 + 6^4 = 1569.
%o (PARI) a(n)={sum(k=1, n, (prime(k)-1)^n)}
%K easy,nonn
%O 1,2
%A _Jason Earls_, Jul 09 2001