a(1)=0; a(n+1) is the least number > a(n) such that Sum_{k=1..n+1} 2^a(k) is not composite.
A113878
a(1)=0; a(n+1) is the least number > a(n) such that Sum_{k=1..n+1} 2^a(k) is not composite.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =4a(4) =7a(5) =16a(6) =53a(7) =66a(8) =207a(9) =1752a(10) =5041a(11) =6310
External references
- oeis: A113878