Number of subsets of the first n primes whose sum is a prime.

Terms

a(0) =1a(1) =3a(2) =5a(3) =7a(4) =12a(5) =20a(6) =35a(7) =65a(8) =122a(9) =237a(10) =448a(11) =846a(12) =1629a(13) =3157a(14) =6159a(15) =12052a(16) =23484a(17) =45731a(18) =89394a(19) =175742a(20) =346214a(21) =681850a(22) =1344838a(23) =2657654a(24) =5253640a(25) =10374991a(26) =20471626a(27) =40401929a(28) =79871387a(29) =158182899