a(n) = A324542(2*prime(n)).

Terms

a(0) =3a(1) =4a(2) =11a(3) =16a(4) =46a(5) =82a(6) =174a(7) =256a(8) =798a(9) =1300a(10) =2734a(11) =4354a(12) =10926a(13) =20518a(14) =51790a(15) =65536a(16) =174766a(17) =351118a(18) =699054a(19) =1110274a(20) =3100238a(21) =5048230a(22) =11184814a(23) =17041414a(24) =49012990a(25) =82623886a(26) =211053038a(27) =284225794a(28) =727960798a(29) =1494039790