OFFSET
1,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (1,3,-3,-3,3,1,-1)
FORMULA
G.f.: x*(1+2*x+5*x^2) / ( (1+x)^3*(1-x)^4 ). - R. J. Mathar, Oct 04 2014
a(n) = (8*n^3+24*n^2+10*n-3-3*(2*n^2+2*n-1)*(-1)^n)/48. - Luce ETIENNE, Nov 21 2014
MATHEMATICA
Rest@ CoefficientList[Series[x (1 + 2 x + 5 x^2)/((1 + x)^3*(1 - x)^4), {x, 0, 48}], x] (* Michael De Vlieger, Jun 12 2019 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
Title simplified by Sean A. Irvine, Jun 12 2019
STATUS
approved