a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = A023531, t = (composite numbers).

A024884

a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = A023531, t = (composite numbers).

Terms

    a(0) =0a(1) =0a(2) =8a(3) =9a(4) =10a(5) =12a(6) =14a(7) =15a(8) =28a(9) =32a(10) =35a(11) =37a(12) =40a(13) =44a(14) =46a(15) =48a(16) =69a(17) =73a(18) =77a(19) =81a(20) =85a(21) =89a(22) =93a(23) =96a(24) =100a(25) =104a(26) =133a(27) =139a(28) =144a(29) =148

External references