Numbers that are not the sum of 4 nonnegative cubes.

Terms

a(0) =5a(1) =6a(2) =7a(3) =12a(4) =13a(5) =14a(6) =15a(7) =19a(8) =20a(9) =21a(10) =22a(11) =23a(12) =26a(13) =31a(14) =33a(15) =34a(16) =38a(17) =39a(18) =40a(19) =41a(20) =42a(21) =45a(22) =46a(23) =47a(24) =48a(25) =49a(26) =50a(27) =52a(28) =53a(29) =57