Numbers n such that sum of first n composites is composite.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =6a(5) =7a(6) =8a(7) =9a(8) =10a(9) =11a(10) =12a(11) =13a(12) =15a(13) =16a(14) =18a(15) =19a(16) =21a(17) =22a(18) =23a(19) =24a(20) =25a(21) =26a(22) =27a(23) =28a(24) =29a(25) =30a(26) =31a(27) =32a(28) =33a(29) =34