Numbers k such that k^2 + 1 is composite and phi(k^2 + 1) == 0 (mod k).

Terms

a(0) =8a(1) =32a(2) =50a(3) =64a(4) =128a(5) =192a(6) =216a(7) =336a(8) =360a(9) =900a(10) =1000a(11) =1152a(12) =1250a(13) =1280a(14) =1344a(15) =1408a(16) =1800a(17) =2450a(18) =2880a(19) =4096a(20) =5440a(21) =6528a(22) =7564a(23) =9216a(24) =9800a(25) =11008a(26) =12544a(27) =13824a(28) =14450a(29) =14976