Increasing gaps in the even sieve (A056533) by lower term.

Terms

a(0) =1a(1) =5a(2) =11a(3) =27a(4) =59a(5) =85a(6) =131a(7) =163a(8) =501a(9) =603a(10) =1145a(11) =1381a(12) =1563a(13) =1937a(14) =2763a(15) =3953a(16) =6731a(17) =7665a(18) =10741a(19) =13787a(20) =22001a(21) =30555a(22) =47953a(23) =52745a(24) =60201a(25) =111541a(26) =137913a(27) =162499a(28) =186163a(29) =282593