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

A024858

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

Terms

    a(0) =3a(1) =4a(2) =15a(3) =25a(4) =61a(5) =98a(6) =203a(7) =329a(8) =622a(9) =1006a(10) =1802a(11) =2916a(12) =5047a(13) =8166a(14) =13821a(15) =22363a(16) =37291a(17) =60338a(18) =99619a(19) =161187a(20) =264348a(21) =427724a(22) =698324a(23) =1129912a(24) =1839195a(25) =2975880a(26) =4834171a(27) =7821853

External references