Numbers n such that ((n-1)^2+1)/2 and n^2+1 and ((n+1)^2+1)/2 are prime if n is even or (n-1)^2+1 and (n^2+1)/2 and (n+1)^2+1 are prime if n is odd.
A082612
Numbers n such that ((n-1)^2+1)/2 and n^2+1 and ((n+1)^2+1)/2 are prime if n is even or (n-1)^2+1 and (n^2+1)/2 and (n+1)^2+1 are prime if n is odd.
Terms
- a(0) =3a(1) =4a(2) =5a(3) =10a(4) =15a(5) =25a(6) =170a(7) =205a(8) =570a(9) =715a(10) =780a(11) =950a(12) =1095a(13) =1315a(14) =1420a(15) =1615a(16) =2055a(17) =2380a(18) =2405a(19) =2730a(20) =2925a(21) =3755a(22) =3850a(23) =4120a(24) =4300a(25) =4615a(26) =4795a(27) =5015a(28) =5055a(29) =5475
External references
- oeis: A082612