Carmichael numbers n such that n-1 is not a practical number.

Terms

a(0) =63973a(1) =126217a(2) =748657a(3) =4463641a(4) =6054985a(5) =9890881a(6) =10837321a(7) =19384289a(8) =26921089a(9) =31146661a(10) =34901461a(11) =41471521a(12) =53711113a(13) =76595761a(14) =140241361a(15) =144218341a(16) =150846961a(17) =151530401a(18) =169057801a(19) =171454321a(20) =171679561a(21) =172430401a(22) =228842209a(23) =277241401a(24) =280761481