Least k > 0 such that 1 + n^2 and 1 + (n+k)^2 have the same smallest prime factor.

Terms

a(0) =2a(1) =6a(2) =2a(3) =26a(4) =2a(5) =74a(6) =2a(7) =4a(8) =2a(9) =404a(10) =2a(11) =6a(12) =2a(13) =366a(14) =2a(15) =514a(16) =2a(17) =4a(18) =2a(19) =1564a(20) =2a(21) =6a(22) =2a(23) =1106a(24) =2a(25) =4010a(26) =2a(27) =4a(28) =2a(29) =34