Increasing gaps between 2-pseudoprimes (upper end).

Terms

a(0) =561a(1) =1105a(2) =4033a(3) =5461a(4) =6601a(5) =7957a(6) =12801a(7) =18705a(8) =23001a(9) =29341a(10) =39865a(11) =72885a(12) =80581a(13) =101101a(14) =149281a(15) =314821a(16) =387731a(17) =710533a(18) =976873a(19) =1246785a(20) =2077545a(21) =2603381a(22) =3316951a(23) =6474691a(24) =7177105a(25) =12261061a(26) =19985269a(27) =24726773a(28) =35428141a(29) =50155733