Number of bases to which terms of A141768 are strong pseudoprimes.

Terms

a(0) =2a(1) =4a(2) =6a(3) =18a(4) =50a(5) =54a(6) =162a(7) =242a(8) =450a(9) =486a(10) =882a(11) =1058a(12) =1782a(13) =3042a(14) =3078a(15) =4050a(16) =5202a(17) =9522a(18) =19602a(19) =22050a(20) =36450a(21) =46818a(22) =54450a(23) =66978a(24) =71442a(25) =95922a(26) =124002a(27) =149058a(28) =183618a(29) =190962