a(n) = s(1)*t(n) + s(2)*t(n-1) + ... + s(k)*t(n+1-k), where k = floor((n+1)/2), s = (natural numbers >= 3), t = A023531.
A024313
a(n) = s(1)*t(n) + s(2)*t(n-1) + ... + s(k)*t(n+1-k), where k = floor((n+1)/2), s = (natural numbers >= 3), t = A023531.
Terms
- a(0) =3a(1) =3a(2) =10a(3) =17a(4) =37a(5) =59a(6) =114a(7) =185a(8) =334a(9) =540a(10) =938a(11) =1518a(12) =2573a(13) =4163a(14) =6946a(15) =11239a(16) =18559a(17) =30029a(18) =49248a(19) =79685a(20) =130090a(21) =210490a(22) =342596a(23) =554332a(24) =900423a(25) =1456915a(26) =2363370a(27) =3824013a(28) =6197753
External references
- oeis: A024313