OFFSET
0,1
LINKS
Vincenzo Librandi and Bruno Berselli, Table of n, a(n) for n = 0..100 (first 66 terms from Vincenzo Librandi).
Index entries for linear recurrences with constant coefficients, signature (0,202,0,-1).
FORMULA
G.f.: (10 + 101*x + 10*x^2 - x^3)/(1 - 202*x^2 + x^4). [Bruno Berselli, Oct 30 2013]
a(n) = 202*a(n-2)-a(n-4). [Bruno Berselli, Oct 30 2013]
MATHEMATICA
Numerator[Convergents[Sqrt[102], 30]] (* Vincenzo Librandi, Oct 30 2013 *)
RecurrenceTable[{a[0] == 10, a[1] == 101, a[2] == 2030, a[3] == 20401, a[n] == 202 a[n - 2] - a[n - 4]}, a, {n, 0, 15}] (* Bruno Berselli, Oct 30 2013 *)
CROSSREFS
KEYWORD
nonn,cofr,frac,easy
AUTHOR
STATUS
approved