OFFSET
0,9
REFERENCES
B. Cais and B. Conrad, Modular curves and Ramanujan's continued fraction, J. Reine Angew. Math. 597 (2006), 27-104. See page 69 (7.27). MR2264315
PROG
(PARI) {a(n)= if(n<1, n==0, round( 4/5*Pi/ sqrt(5*n-1)* cos(2/25*Pi* (5*n-2))* besseli(1, 4/25*Pi* sqrt(5*n-1))) )}
CROSSREFS
KEYWORD
sign
AUTHOR
Michael Somos, Mar 19 2007
STATUS
approved