OFFSET
4,1
LINKS
R. H. Hardin, Table of n, a(n) for n=4..500
Index entries for linear recurrences with constant coefficients, signature (1,0,2,-1,-1).
FORMULA
G.f.: -x^4*(-13-7*x-10*x^2+12*x^3+8*x^4) / ( (x-1)*(x^4+2*x^3-1) ). - R. J. Mathar, Jan 19 2011
MATHEMATICA
LinearRecurrence[{1, 0, 2, -1, -1}, {13, 20, 30, 44, 63}, 50] (* Harvey P. Dale, Jun 24 2021 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
R. H. Hardin, Aug 14 2009
STATUS
approved