Number of compositions (ordered partitions) of n into an even number of primes.

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =1a(5) =2a(6) =1a(7) =2a(8) =3a(9) =6a(10) =9a(11) =8a(12) =16a(13) =24a(14) =40a(15) =52a(16) =72a(17) =112a(18) =172a(19) =256a(20) =364a(21) =528a(22) =804a(23) =1188a(24) =1757a(25) =2548a(26) =3782a(27) =5614a(28) =8308a(29) =12214