Strong pseudoprimes to base 3 of the form 6*k-1.

Terms

a(0) =3281a(1) =432821a(2) =973241a(3) =1551941a(4) =1683683a(5) =1898999a(6) =2202257a(7) =2545181a(8) =2586083a(9) =2795519a(10) =3020093a(11) =3028133a(12) =4042403a(13) =4099439a(14) =4561481a(15) =4923521a(16) =5087171a(17) =5173601a(18) =5193161a(19) =5774801a(20) =6710177a(21) =8243111a(22) =9846401