Number of nine-prime Carmichael numbers less than 10^n.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =0a(10) =0a(11) =0a(12) =0a(13) =1a(14) =27a(15) =170a(16) =1436a(17) =8835a(18) =44993a(19) =196391a(20) =762963a(21) =2714473a(22) =8939435a(23) =27660029a(24) =81041495