a(n) = s(1)*t(n) + s(2)*t(n-1) + ... + s(k)*t(n-k+1), where k = floor(n/2), s = A023533, t = A000040 (primes).

A025127

a(n) = s(1)*t(n) + s(2)*t(n-1) + ... + s(k)*t(n-k+1), where k = floor(n/2), s = A023533, t = A000040 (primes).

Terms

    a(0) =3a(1) =5a(2) =7a(3) =11a(4) =13a(5) =17a(6) =30a(7) =36a(8) =46a(9) =50a(10) =60a(11) =70a(12) =74a(13) =84a(14) =94a(15) =102a(16) =108a(17) =120a(18) =161a(19) =171a(20) =187a(21) =197a(22) =209a(23) =229a(24) =243a(25) =253a(26) =271a(27) =281a(28) =289a(29) =313

External references