Number of sets of distinct primes whose sum is a prime, the largest element of a set is prime(n).

Terms

a(0) =1a(1) =2a(2) =2a(3) =2a(4) =5a(5) =8a(6) =15a(7) =30a(8) =57a(9) =115a(10) =211a(11) =398a(12) =783a(13) =1528a(14) =3002a(15) =5893a(16) =11432a(17) =22247a(18) =43663a(19) =86348a(20) =170472a(21) =335636a(22) =662988a(23) =1312816a(24) =2595986a(25) =5121351a(26) =10096635a(27) =19930303a(28) =39469458a(29) =78311512