a(n) is not of the form prime + a(k), k < n.

Terms

a(0) =0a(1) =1a(2) =9a(3) =10a(4) =25a(5) =34a(6) =35a(7) =49a(8) =55a(9) =85a(10) =91a(11) =100a(12) =115a(13) =121a(14) =125a(15) =133a(16) =145a(17) =155a(18) =169a(19) =175a(20) =187a(21) =195a(22) =205a(23) =217a(24) =235a(25) =247a(26) =253a(27) =259a(28) =265a(29) =289