a(0) = 4; for n>0, a(n) = a(n-1)^2 - 2^(1+2^(n-1)).
A152121
a(0) = 4; for n>0, a(n) = a(n-1)^2 - 2^(1+2^(n-1)).
Terms
- a(0) =4a(1) =12a(2) =136a(3) =18464a(4) =340918784
External references
- oeis: A152121
A152121
a(0) = 4; for n>0, a(n) = a(n-1)^2 - 2^(1+2^(n-1)).