Upper ends of record gaps between numbers that are either primes or semiprimes.

Terms

a(0) =3a(1) =9a(2) =29a(3) =101a(4) =247a(5) =2531a(6) =16033a(7) =26615a(8) =39359a(9) =104677a(10) =248426a(11) =506531a(12) =584237a(13) =2560202a(14) =4036993a(15) =4417843a(16) =5167619a(17) =9725141a(18) =25045807a(19) =27489719a(20) =70416301a(21) =111555415a(22) =174266734a(23) =359589619a(24) =1075714987a(25) =6820213399a(26) =15378035231a(27) =16598109538a(28) =19423306117a(29) =30133946758