Numbers that are not the sum of two triangular numbers.

Terms

a(0) =5a(1) =8a(2) =14a(3) =17a(4) =19a(5) =23a(6) =26a(7) =32a(8) =33a(9) =35a(10) =40a(11) =41a(12) =44a(13) =47a(14) =50a(15) =52a(16) =53a(17) =54a(18) =59a(19) =62a(20) =63a(21) =68a(22) =71a(23) =74a(24) =75a(25) =77a(26) =80a(27) =82a(28) =85a(29) =86