a(n) = Sum_{2 <= p <= n, p prime} p^2.

Terms

a(0) =0a(1) =4a(2) =13a(3) =13a(4) =38a(5) =38a(6) =87a(7) =87a(8) =87a(9) =87a(10) =208a(11) =208a(12) =377a(13) =377a(14) =377a(15) =377a(16) =666a(17) =666a(18) =1027a(19) =1027a(20) =1027a(21) =1027a(22) =1556a(23) =1556a(24) =1556a(25) =1556a(26) =1556a(27) =1556a(28) =2397a(29) =2397