A161140 - OEIS

%I #8 Dec 04 2017 18:59:52

%S 1,2,4,8,16,22,32,44,64,88,128,176,222,256,352,444,484,512,704,888,

%T 968,1024,1408,1776,1936,2048,2222,2816,3552,3872,4096,4444,4884,5632,

%U 7104,7744,8192,8888,9768,10648,11264,14208,15488,16384,17776

%N Numbers which can be expressed as the product of numbers made of only twos.

%e 1 is the empty product; 44 is in the list because 44 = 2 * 22, 484 is in the list because 484 = 22 * 22.

%Y Cf. A084034, A161141, A161142, A161143, A161144, A161145, A161146, A161147.

%K nonn,base

%O 1,2

%A _Claudio Meller_, Jun 03 2009

%E 1 added by _N. J. A. Sloane_, Dec 04 2017