Numbers of the forms 2^n-2, 2^n-1, 2^n, 2^n+1 and 2^n+2.

Terms

a(0) =-1a(1) =0a(2) =1a(3) =2a(4) =3a(5) =4a(6) =5a(7) =6a(8) =7a(9) =8a(10) =9a(11) =10a(12) =14a(13) =15a(14) =16a(15) =17a(16) =18a(17) =30a(18) =31a(19) =32a(20) =33a(21) =34a(22) =62a(23) =63a(24) =64a(25) =65a(26) =66a(27) =126a(28) =127a(29) =128