a(n) = s(1)*t(n) + s(2)*t(n-1) + ... + s(k)*t(n+1-k), where k = floor((n+1)/2), s = A023533, t = A000040.
A024694
a(n) = s(1)*t(n) + s(2)*t(n-1) + ... + s(k)*t(n+1-k), where k = floor((n+1)/2), s = A023533, t = A000040.
Terms
- a(0) =2a(1) =3a(2) =5a(3) =7a(4) =11a(5) =13a(6) =24a(7) =30a(8) =36a(9) =46a(10) =50a(11) =60a(12) =70a(13) =74a(14) =84a(15) =94a(16) =102a(17) =108a(18) =149a(19) =161a(20) =171a(21) =187a(22) =197a(23) =209a(24) =229a(25) =243a(26) =253a(27) =271a(28) =281a(29) =289
External references
- oeis: A024694