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

A025100

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

Terms

    a(0) =6a(1) =8a(2) =25a(3) =28a(4) =59a(5) =68a(6) =129a(7) =148a(8) =249a(9) =277a(10) =454a(11) =491a(12) =728a(13) =790a(14) =1131a(15) =1225a(16) =1650a(17) =1759a(18) =2313a(19) =2436a(20) =3173a(21) =3338a(22) =4197a(23) =4414a(24) =5495a(25) =5732a(26) =7003a(27) =7304a(28) =8737a(29) =9108

External references