A166326 - OEIS

%I #6 May 11 2023 12:36:51

%S -1,17,7849,3667649,2395420006033,3143661612445145,

%T 11877172892329028459041,32347093457545958193355601,

%U 424678439961073471604787362241217

%N a(n) = prime(n)^(prime(n)+1) - (prime(n)+1)^prime(n).

%F a(n) = A104126(n) - A104127(n) = A007925(A000040(n)). - _R. J. Mathar_, Oct 14 2009

%e a(1) = 2^3 - 3^2 = -1. a(2) = 3^4 - 4^3 = 17. a(3) = 5^6 - 6^5 = 7849.

%t Array[Prime[ # ]^(Prime[ # ]+1)-(Prime[ # ]+1)^Prime[ # ]&,16]

%Y Cf. A000040, A007925, A140893, A104126, A104127.

%K sign

%O 1,2

%A _Vladimir Joseph Stephan Orlovsky_, Oct 11 2009

%E Keyword:sign set by _R. J. Mathar_, Oct 14 2009