Records values in A072994.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =9a(5) =16a(6) =18a(7) =32a(8) =40a(9) =64a(10) =80a(11) =81a(12) =128a(13) =160a(14) =162a(15) =200a(16) =256a(17) =320a(18) =324a(19) =400a(20) =512a(21) =640a(22) =648a(23) =800a(24) =1024a(25) =1280a(26) =1296a(27) =1600a(28) =2048a(29) =2176