A122405 - OEIS

A122405

Numbers of the form Product_i b_i^e_i, where the b_i are all distinct values > 1 and the e_i are a permutation of the b_i.

%I #4 Mar 31 2012 13:21:32

%S 1,4,27,72,108,256,800,1024,2304,3125,5184,6272,6912,9216,10368,12500,

%T 16384,18432,20736,21600,27648,30375,36000,41472,46656,48600,62208,

%U 84375,102400,121500,124416,157464,169344,186624,204800,209952,225000

%N Numbers of the form Product_i b_i^e_i, where the b_i are all distinct values > 1 and the e_i are a permutation of the b_i.

%e 2^2 * 3^4 * 4^3 = 20736, so 20736 is in the sequence.

%Y Cf. A122406.

%K nonn

%O 1,2

%A _Franklin T. Adams-Watters_, Sep 01 2006