a(n) = prime(n) + prime(n^2).

Terms

a(0) =4a(1) =10a(2) =28a(3) =60a(4) =108a(5) =164a(6) =244a(7) =330a(8) =442a(9) =570a(10) =692a(11) =864a(12) =1050a(13) =1236a(14) =1474a(15) =1672a(16) =1938a(17) =2204a(18) =2504a(19) =2812a(20) =3156a(21) =3540a(22) =3886a(23) =4300a(24) =4734a(25) =5152a(26) =5622a(27) =6114a(28) =6590a(29) =7110