Numbers m such that m^2+1 is prime with (m-1)^2+1 and (m+1)^2+1 semiprimes.

Terms

a(0) =4a(1) =10a(2) =170a(3) =570a(4) =780a(5) =950a(6) =1420a(7) =2380a(8) =2730a(9) =3850a(10) =4120a(11) =4300a(12) =5850a(13) =6360a(14) =6460a(15) =6800a(16) =6970a(17) =7100a(18) =7240a(19) =8720a(20) =9630a(21) =10150a(22) =10580a(23) =11010a(24) =11170a(25) =11830a(26) =12300a(27) =14290a(28) =16330a(29) =17670