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

A025079

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

Terms

    a(0) =3a(1) =4a(2) =11a(3) =18a(4) =43a(5) =69a(6) =145a(7) =235a(8) =470a(9) =760a(10) =1462a(11) =2366a(12) =4439a(13) =7182a(14) =13217a(15) =21386a(16) =38785a(17) =62755a(18) =112485a(19) =182005a(20) =323148a(21) =522864a(22) =921036a(23) =1490268a(24) =2607723a(25) =4219384a(26) =7341335

External references