Least k such that k*(2^p-1)*(k*(2^p-1)-1)-1 is prime, where 2^p-1 runs through the Mersenne primes.
A137906
Least k such that k*(2^p-1)*(k*(2^p-1)-1)-1 is prime, where 2^p-1 runs through the Mersenne primes.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =4a(6) =1a(7) =27a(8) =14a(9) =34a(10) =6a(11) =132a(12) =97a(13) =1a(14) =500a(15) =1816a(16) =1292a(17) =136a(18) =2445a(19) =15a(20) =1934a(21) =5472a(22) =1584a(23) =2734a(24) =21022a(25) =5870
External references
- oeis: A137906