a(n) is the minimum positive integer m such that m * 2^(n + 2) + 1 is a prime number which does not divide ((F(n + 2) - 1)^m - 1)/(F(n + 2) - 2), where F(n) is the n-th Fermat number (A000215).
A308695
a(n) is the minimum positive integer m such that m * 2^(n + 2) + 1 is a prime number which does not divide ((F(n + 2) - 1)^m - 1)/(F(n + 2) - 2), where F(n) is the n-th Fermat number (A000215).
Terms
- a(0) =1a(1) =2a(2) =1a(3) =8a(4) =4a(5) =2a(6) =1a(7) =128a(8) =64a(9) =32a(10) =16a(11) =8a(12) =4a(13) =2a(14) =1a(15) =6300a(16) =3150a(17) =26a(18) =13a(19) =579a(20) =1069378a(21) =534689a(22) =10a(23) =5a(24) =387304a(25) =193652a(26) =96826a(27) =48413a(28) =141015a(29) =298082
External references
- oeis: A308695