A025103 - OEIS

A025103

a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (composite numbers), t = (F(2), F(3), F(4), ...).

%I #3 Mar 30 2012 18:56:01

%S 8,12,38,62,140,226,438,709,1277,2066,3595,5817,9888,15999,26712,

%T 43221,71357,115458,189407,306467,500534,809881,1318332,2133106,

%U 3464858,5606258,9094804

%N a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (composite numbers), t = (F(2), F(3), F(4), ...).

%K nonn

%O 1,1

%A _Clark Kimberling_