Even pseudoprimes to base 19.

Terms

a(0) =6a(1) =18a(2) =906a(3) =5466a(4) =257302a(5) =825366a(6) =1880082a(7) =6637546a(8) =6765826a(9) =8936722a(10) =9483706a(11) =34087054a(12) =51914026a(13) =54806454a(14) =57663334a(15) =57819882a(16) =67372378a(17) =91835206a(18) =98963734a(19) =102985926a(20) =117697186a(21) =134457346a(22) =143888806a(23) =172530646a(24) =206623266