OFFSET
0,2
COMMENTS
To find Y-values: with c(n) and d(n) as defined in the Formula section, b(n) = c(n)*(-1+d(n)), which gives 0, 4, 480, 47916, 4704000, 461030324, 45177121440, ...
LINKS
Index entries for linear recurrences with constant coefficients, signature (108,-982,108,-1).
FORMULA
a(n) = c(n)*(1+d(n)) with c(0)=0, c(1)=1 and c(n) = 10*c(n-1) - c(n-2); d(0)=1, d (1)=5 and d(n) = 10*d(n-1) - d(n-2).
For n >= 4, a(n) = 108*a(n-1) - 982*a(n-2) + 108*a(n-3) - a(n-4). - Max Alekseyev, Nov 13 2009
G.f.: 2*x*(3*x^2 - 74*x + 3)/((x^2 - 98*x + 1)*(x^2 - 10*x + 1)). - Colin Barker, Oct 25 2012
MATHEMATICA
LinearRecurrence[{108, -982, 108, -1}, {0, 6, 500, 48114}, 20] (* Harvey P. Dale, Aug 19 2012 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Mohamed Bouhamida, Oct 10 2006
EXTENSIONS
More terms from Max Alekseyev, Nov 13 2009
More terms from Harvey P. Dale, Aug 19 2012
STATUS
approved