female_seq := proc(n)
	if (n = 0) then
		return 1;
	else
		return n - male_seq(female_seq(n-1));
	end if;
end proc;

male_seq  := proc(n)
	if (n = 0) then
		return 0;
	else
		return n - female_seq(male_seq(n-1));
	end if;
end proc;
seq(female_seq(i), i=0..10);
seq(male_seq(i), i=0..10);