OFFSET
1,2
COMMENTS
FORMULA
a(n) = 7^(2^(n-1))*b(n) where b(n)=b(n-1)-b(n-1)^2 with b(1)=1/7.
EXAMPLE
f(n) = 7, 7/6, 49/43, 2401/2143, ...
7 + 7/6 = 7 * 7/6 = 49/6; 7 + 7/6 + 49/43 = 7 * 7/6 * 49/43 = 2401/258; ...
s(n) = 1/b(n) = 7, 49/6, 2401/258, ...
MAPLE
b:=proc(n) option remember; b(n-1)-b(n-1)^2; end:
b(1):=1/7;
a:=n->7^(2^(n-1))*b(n);
seq(a(i), i=1..8);
CROSSREFS
KEYWORD
nonn
AUTHOR
Martin Renner, Apr 30 2013
STATUS
approved