(Apparently) differences between adjacent perfect powers (integers of form a^b, a >= 1, b >= 2).

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =7a(6) =8a(7) =9a(8) =10a(9) =11a(10) =12a(11) =13a(12) =15a(13) =16a(14) =17a(15) =18a(16) =19a(17) =20a(18) =21a(19) =23a(20) =24a(21) =25a(22) =26a(23) =27a(24) =28a(25) =30a(26) =32a(27) =33a(28) =35a(29) =36