Local maxima of A053707 (first differences of A025475, powers of a prime but not prime).

Terms

a(0) =4a(1) =9a(2) =17a(3) =40a(4) =74a(5) =54a(6) =151a(7) =120a(8) =307a(9) =312a(10) =199a(11) =408a(12) =356a(13) =424a(14) =912a(15) =1032a(16) =1217a(17) =840a(18) =1872a(19) =423a(20) =1608a(21) =2518a(22) =1588a(23) =1920a(24) =1230a(25) =2112a(26) =3713a(27) =1560a(28) =5208a(29) =2832