a(n) is the smallest prime such that it and the previous four primes are all of the form x^2 + n * y^2.
A212605
a(n) is the smallest prime such that it and the previous four primes are all of the form x^2 + n * y^2.
Terms
- a(0) =2633a(1) =587a(2) =1777a(3) =2633a(4) =239521a(5) =862471a(6) =2017a(7) =208457a(8) =586273a(9) =147451a(10) =4951a(11) =586273a(12) =207073a(13) =612553a(14) =102871a(15) =208457a(16) =301681a(17) =351439a(18) =242447a(19) =2076901a(20) =55948657a(21) =27487a(22) =119503a(23) =9425257a(24) =239521a(25) =5188507a(26) =128467a(27) =75853a(28) =74049413
External references
- oeis: A212605