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

A024589

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

Terms

    a(0) =4a(1) =8a(2) =24a(3) =38a(4) =86a(5) =140a(6) =271a(7) =438a(8) =789a(9) =1277a(10) =2222a(11) =3595a(12) =6111a(13) =9888a(14) =16509a(15) =26712a(16) =44101a(17) =71357a(18) =117060a(19) =189407a(20) =309347a(21) =500534a(22) =814774a(23) =1318332a(24) =2141400a(25) =3464858a(26) =5620898a(27) =9094804

External references