Record gaps between nonprime prime powers.

Terms

a(0) =3a(1) =4a(2) =7a(3) =9a(4) =17a(5) =40a(6) =41a(7) =74a(8) =151a(9) =307a(10) =312a(11) =408a(12) =424a(13) =912a(14) =1032a(15) =1217a(16) =1872a(17) =2518a(18) =3713a(19) =4920a(20) =5208a(21) =8400a(22) =8520a(23) =8892a(24) =9297a(25) =12840a(26) =16008a(27) =21840a(28) =24360a(29) =35880