Least k such that k*M#(n) + 1 is prime where M#(n) is the product of the first n Mersenne primes = Product_{j=1..n} A000668(j).
A098920
Least k such that k*M#(n) + 1 is prime where M#(n) is the product of the first n Mersenne primes = Product_{j=1..n} A000668(j).
Terms
- a(0) =2a(1) =2a(2) =2a(3) =6a(4) =30a(5) =10a(6) =4a(7) =26a(8) =12a(9) =10a(10) =12a(11) =436a(12) =644a(13) =424a(14) =2164a(15) =862a(16) =408a(17) =9558a(18) =5226a(19) =12350
External references
- oeis: A098920