Numbers k such that k^2 + 1 is a Fermat pseudoprime to base 3.

Terms

a(0) =216a(1) =660a(2) =1484a(3) =1560a(4) =8208a(5) =52164a(6) =544320a(7) =592956a(8) =649800a(9) =4321800a(10) =5103210a(11) =6182220a(12) =10621380a(13) =21415680a(14) =24471720a(15) =135307008a(16) =359624088a(17) =535019100a(18) =1071782250a(19) =1113233520a(20) =1227427740a(21) =1527496740a(22) =9462748008a(23) =143935711920