a(n) = 1*t(n) + 2*t(n-1) + ... + k*t(n+1-k), where k=floor((n+1)/2) and t = A000032 (Lucas numbers).

A023861

a(n) = 1*t(n) + 2*t(n-1) + ... + k*t(n+1-k), where k=floor((n+1)/2) and t = A000032 (Lucas numbers).

Terms

    a(0) =1a(1) =3a(2) =10a(3) =15a(4) =37a(5) =61a(6) =126a(7) =203a(8) =384a(9) =622a(10) =1114a(11) =1802a(12) =3119a(13) =5047a(14) =8542a(15) =13821a(16) =23047a(17) =37291a(18) =61568a(19) =99619a(20) =163376a(21) =264348a(22) =431588a(23) =698324a(24) =1136685a(25) =1839195a(26) =2987682a(27) =4834171a(28) =7842313a(29) =12689129

External references