Numbers that are not the sum of 3 pentagonal numbers.

Terms

a(0) =4a(1) =8a(2) =9a(3) =16a(4) =19a(5) =20a(6) =21a(7) =26a(8) =30a(9) =31a(10) =33a(11) =38a(12) =42a(13) =43a(14) =50a(15) =54a(16) =55a(17) =60a(18) =65a(19) =67a(20) =77a(21) =81a(22) =84a(23) =88a(24) =89a(25) =90a(26) =96a(27) =99a(28) =100a(29) =101