OFFSET
0,2
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..2000 (first 500 terms from R. H. Hardin)
Index entries for linear recurrences with constant coefficients, signature (1,1,1,-1).
FORMULA
G.f.: -(x+1)*(x^5-x^2-1)/(x^4-x^3-x^2-x+1). - R. J. Mathar, Nov 28 2011
MATHEMATICA
LinearRecurrence[{1, 1, 1, -1}, {1, 2, 4, 8, 13, 22, 38}, 40] (* Amiram Eldar, Nov 26 2025 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
R. H. Hardin, Aug 14 2009
EXTENSIONS
Edited by Alois P. Heinz, Oct 12 2017
STATUS
approved