OFFSET
0,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..200
Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 390, 0, 0, 0, -1).
FORMULA
G.f.: (27 +28*x +167*x^2 +195*x^3 +167*x^4 -28*x^5 +27*x^6 -x^7)/(1 -390*x^4 +x^8). - Vincenzo Librandi, Nov 26 2013
a(n) = 390*a(n-4) - a(n-8). - Vincenzo Librandi, Nov 26 2013
MATHEMATICA
Numerator[Convergents[Sqrt[776], 30]] (* Harvey P. Dale, Mar 09 2013 *)
CoefficientList[Series[(27 + 28 x + 167 x^2 + 195 x^3 + 167 x^4 - 28 x^5 + 27 x^6 - x^7)/(1 - 390 x^4 + x^8), {x, 0, 30}], x] (* Vincenzo Librandi, Nov 26 2013 *)
PROG
(Magma) I:=[27, 28, 167, 195, 10697, 10892, 65157, 76049]; [n le 8 select I[n] else 390*Self(n-4)-Self(n-8): n in [1..30]]; // Vincenzo Librandi, Nov 26 2013
CROSSREFS
KEYWORD
nonn,cofr,frac,easy
AUTHOR
EXTENSIONS
More terms from Harvey P. Dale, Mar 09 2013
STATUS
approved