The smallest square referenced in A237043 (Numbers n such that 2^n - 1 is not squarefree, but 2^d - 1 is squarefree for every proper divisor d of n.).
A282631
The smallest square referenced in A237043 (Numbers n such that 2^n - 1 is not squarefree, but 2^d - 1 is squarefree for every proper divisor d of n.).
Terms
- a(0) =9a(1) =25a(2) =49a(3) =121a(4) =289a(5) =961a(6) =529a(7) =1194649a(8) =1849a(9) =5329a(10) =841a(11) =16129a(12) =7921a(13) =2209
External references
- oeis: A282631