a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n-k+1), where k = [ n/2 ], s = A000201 (lower Wythoff sequence).

A025118

a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n-k+1), where k = [ n/2 ], s = A000201 (lower Wythoff sequence).

Terms

    a(0) =3a(1) =4a(2) =18a(3) =26a(4) =57a(5) =70a(6) =129a(7) =148a(8) =244a(9) =281a(10) =413a(11) =462a(12) =649a(13) =722a(14) =960a(15) =1048a(16) =1356a(17) =1462a(18) =1848a(19) =1990a(20) =2447a(21) =2609a(22) =3163a(23) =3346a(24) =4006a(25) =4237a(26) =4987a(27) =5246a(28) =6117a(29) =6429

External references