Numbers that are not the sum of 3 distinct nonzero triangular numbers.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =7a(7) =8a(8) =9a(9) =11a(10) =12a(11) =13a(12) =15a(13) =16a(14) =18a(15) =20a(16) =21a(17) =23a(18) =27a(19) =29a(20) =33a(21) =36a(22) =38a(23) =48a(24) =51a(25) =78a(26) =111a(27) =183