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 (2,-1,2,-3,1).
FORMULA
G.f.: -x^4*(13-6*x+4*x^2-20*x^3+8*x^4) / ( (x-1)*(x^4-2*x^3-x+1) ). - R. J. Mathar, Jan 19 2011
MATHEMATICA
LinearRecurrence[{2, -1, 2, -3, 1}, {13, 20, 31, 48, 74}, 40] (* Harvey P. Dale, Dec 28 2017 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
R. H. Hardin, Aug 14 2009
STATUS
approved