a(n+1) (n >= 1) is smallest number > a(n) which is the sum of cubes of distinct earlier terms.

Terms

a(0) =1a(1) =1a(2) =2a(3) =8a(4) =9a(5) =10a(6) =512a(7) =513a(8) =514a(9) =520a(10) =521a(11) =522a(12) =729a(13) =730a(14) =731a(15) =737a(16) =738a(17) =739a(18) =1000a(19) =1001a(20) =1002a(21) =1008a(22) =1009a(23) =1010a(24) =1241a(25) =1242a(26) =1243a(27) =1249a(28) =1250a(29) =1251