OFFSET
0,1
LINKS
Index entries for linear recurrences with constant coefficients, signature (0,4,0,-6,0,4,0,-1).
FORMULA
G.f.: 2*( 1-x^2+12*x^3-x^4+x^6 ) / ( (x-1)^4*(1+x)^4 ). - R. J. Mathar, Jul 02 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Paul Curtz, Dec 17 2009
STATUS
approved