login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

a(1) = 1, for n >= 2: a(n) = n^a(n-1) + 1.
0

%I #4 Sep 26 2012 13:47:33

%S 1,3,28,72057594037927937

%N a(1) = 1, for n >= 2: a(n) = n^a(n-1) + 1.

%C The next term is too large to include.

%e For n = 3: a(3) = 3^3 + 1 = 28.

%t Transpose[NestList[{#[[1]]+1,(#[[1]]+1)^#[[2]]+1}&,{1,1},3]][[2]] (* _Harvey P. Dale_, Sep 26 2012 *)

%K nonn

%O 1,2

%A _Jaroslav Krizek_, Nov 03 2010