%I
%S 1,2,3,4,5,6,7,10,8,11,9,14,12,13,15,22,20,17,21,18,26,16,25,28,19,33,
%T 30,34,24,35,44,23,39,42,38,40,55,27,52,29,50,51,36,49,66,46,56,65,45,
%U 68,31,70,57,32,60,77,78,58,88,85,63,76,37,110,69,48,84,91,75,102,62,54,98,104,95
%N a(1) =1; for n>1, if A025487(n) = Product p(i)^e(i), then a(n) = Product p(e(i)).
%C A permutation of the natural numbers.
%H Amiram Eldar, <a href="/A181820/b181820.txt">Table of n, a(n) for n = 1..10000</a>
%F a(n)=A181819(A025487(n)).
%F a(n)=A122111(A181815(n)).
%e A025487(8) = 24 = 2^3*3 has the exponents (3,1) in its canonical prime factorization. Accordingly, a(8) = prime(3)*prime(1) (i.e., A000040(3)*A000040(1)), which equals 5*2=10.
%Y A181815 is another mapping from the members of A025487 to the positive integers. Also see A181819, A181821.
%K nonn
%O 1,2
%A _Matthew Vandermast_, Dec 07 2010
