A024472 a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (Lucas numbers), t = (F(2), F(3), ...).

1, 2, 9, 14, 35, 57, 127, 205, 420, 680, 1334, 2158, 4101, 6636, 12335, 19958, 36473, 59015, 106435, 172215, 307306, 497232, 879564, 1423164, 2499145, 4043702, 7057077

Offset

1,2

Links

Table of n, a(n) for n=1..27.

Formula

Conjecture: G.f.: x*(-1-x-4*x^2-x^3+2*x^4) / ( (x^2-x-1) *(x^2+1) *(x^2+x-1)^2 ). - R. J. Mathar, Apr 27 2020

Crossrefs

Sequence in context: A324275 A106360 A024470 * A279089 A128780 A178849

Adjacent sequences: A024469 A024470 A024471 * A024473 A024474 A024475

Keyword

nonn

Author

Clark Kimberling

Status

approved