%I #5 Apr 09 2014 10:15:21

%S 2,10,50,150,3150,9450,141750,850500,11056500,154791000,773955000,

%T 41019615000,1066509990000,3199529970000,15997649850000,

%U 239964747750000,2399647477500000,43193654595000000,2893974857865000000

%N a(1)=2. a(n) = the smallest positive multiple of a(n-1) that is > a(n-1) and has the same number of 0's as 1's in its binary representation.

%Y Cf. A031443, A143146.

%K base,nonn

%O 1,1

%A _Leroy Quet_, Jul 27 2008

%E a(5)-a(19) from _Donovan Johnson_, Sep 03 2008