OFFSET
1,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (0,398,0,-1).
FORMULA
a(1)=1, a(2)=131, a(3)=398*a(1)+a(2), a(4)=398*a(2)+a(1), a(n)=398*a(n-2)-a(n-4) for n>4.
G.f.: x*(1+x)*(1+130*x+x^2)/((1-20*x+x^2)*(1+20*x+x^2)). [Bruno Berselli, Feb 21 2013]
MATHEMATICA
LinearRecurrence[{0, 398, 0, -1}, {1, 131, 529, 52139}, 17]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Pierre CAMI, Apr 22 2005
EXTENSIONS
More terms from Bruno Berselli, Feb 21 2013
STATUS
approved