a(n) is the least nonnegative integer k such that (k^2 + prime(n)^2)/2 is prime but (k^2 + prime(i)^2)/2 is not prime for i < n.
A358804
a(n) is the least nonnegative integer k such that (k^2 + prime(n)^2)/2 is prime but (k^2 + prime(i)^2)/2 is not prime for i < n.
Terms
- a(0) =0a(1) =1a(2) =3a(3) =15a(4) =31a(5) =45a(6) =143a(7) =81a(8) =233a(9) =151a(10) =71a(11) =353a(12) =141a(13) =537a(14) =457a(15) =1663a(16) =209a(17) =391a(18) =707a(19) =1081a(20) =1877a(21) =1161a(22) =3807a(23) =2361a(24) =5657a(25) =1399a(26) =2783a(27) =2967a(28) =3149a(29) =2923
External references
- oeis: A358804