Numbers n^2+1 such that (n-1)^2+1 and (n+1)^2+1 are prime.

Terms

a(0) =10a(1) =26a(2) =226a(3) =626a(4) =3026a(5) =15626a(6) =42026a(7) =148226a(8) =216226a(9) =403226a(10) =416026a(11) =511226a(12) =1199026a(13) =1311026a(14) =1380626a(15) =1550026a(16) =1625626a(17) =1729226a(18) =1890626a(19) =2449226a(20) =2608226a(21) =2805626a(22) =2839226a(23) =3861226a(24) =4223026a(25) =4347226a(26) =4389026a(27) =5784026a(28) =6027026a(29) =6426226