OFFSET
1,2
COMMENTS
FORMULA
a(n) = 9^(2^(n-1))*b(n) where b(n)=b(n-1)-b(n-1)^2 with b(1)=1/9.
EXAMPLE
f(n) = 9, 9/8, 81/73, 6561/5977, ...
9 + 9/8 = 9 * 9/8 = 81/8; 9 + 9/8 + 81/73 = 9 * 9/8 * 81/73 = 6561/584; ...
s(n) = 1/b(n) = 9, 81/8, 6561/584, ...
MAPLE
b:=proc(n) option remember; b(n-1)-b(n-1)^2; end:
b(1):=1/9;
a:=n->9^(2^(n-1))*b(n);
seq(a(i), i=1..8);
CROSSREFS
KEYWORD
nonn
AUTHOR
Martin Renner, Apr 30 2013
STATUS
approved