a(n) is the positive integer x such that 3^((M-1)/(2*p)) == -2^x (mod M), where p > 2 is prime, M=2^p-1 is the n-th Mersenne prime and x < p.
A278792
a(n) is the positive integer x such that 3^((M-1)/(2*p)) == -2^x (mod M), where p > 2 is prime, M=2^p-1 is the n-th Mersenne prime and x < p.
Terms
- a(0) =2a(1) =2a(2) =1a(3) =6a(4) =16a(5) =4a(6) =5a(7) =25a(8) =18a(9) =20a(10) =45a(11) =61a(12) =91a(13) =939a(14) =817a(15) =336a(16) =862a(17) =2533a(18) =3404a(19) =2822a(20) =3136a(21) =1554a(22) =9371a(23) =10712a(24) =21311a(25) =44296a(26) =68185a(27) =66909a(28) =31147a(29) =25648
External references
- oeis: A278792