OFFSET
0,1
COMMENTS
Arises in an important Ramanujan formula for Pi: 4/Pi=1123/882-22583/882^3*(1/2*(1*3)/4^2)+...
REFERENCES
L. Berggren, J. Borwein and P. Borwein, "Pi: A source book", Springer, second edition, p. 328.
S. Ramanujan, "Modular equations and approximations to Pi", Quart. J. Pure Appl. Math., v. 45, 1914, p. 350-372.
LINKS
Harvey P. Dale, Table of n, a(n) for n = 0..1000
Tanya Khovanova, Recursive Sequences
Index entries for linear recurrences with constant coefficients, signature (2,-1).
FORMULA
a(0)=1123, a(1)=22583, a(n)=2*a(n-1)-a(n-2). - Harvey P. Dale, Feb 04 2015
MATHEMATICA
21460*Range[0, 30]+1123 (* or *) LinearRecurrence[{2, -1}, {1123, 22583}, 30] (* Harvey P. Dale, Feb 04 2015 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Benoit Cloitre, May 01 2002
STATUS
approved