Differences between two positive cubes in exactly 1 way.

Terms

a(0) =7a(1) =19a(2) =26a(3) =37a(4) =56a(5) =61a(6) =63a(7) =91a(8) =98a(9) =117a(10) =124a(11) =127a(12) =152a(13) =169a(14) =189a(15) =208a(16) =215a(17) =217a(18) =218a(19) =271a(20) =279a(21) =296a(22) =316a(23) =331a(24) =335a(25) =342a(26) =386a(27) =387a(28) =397a(29) =448