A165784 - OEIS

A165784

a(1)=1. For n >= 2, each a(n) = the decimal equivalent of either a(k)U0Ua(k) or a(k)U1Ua(k), where U denotes concatenation of the binary representations of the arguments, and where k is some positive integer < n. The numbers are arranged in numerical order.

%I #7 Mar 11 2014 01:32:48

%S 1,5,7,85,93,119,127,21845,21973,23901,24029,30583,30711,32639,32767,

%T 1431655765,1431688533,1440044501,1440077269,1566399837,1566432605,

%U 1574788573,1574821341,2004318071,2004350839,2012706807,2012739575

%N a(1)=1. For n >= 2, each a(n) = the decimal equivalent of either a(k)U0Ua(k) or a(k)U1Ua(k), where U denotes concatenation of the binary representations of the arguments, and where k is some positive integer < n. The numbers are arranged in numerical order.

%C Each term is a palindrome when written in base 2.

%Y Cf. A165785

%K base,nonn

%O 1,2

%A _Leroy Quet_, Sep 26 2009

%E More terms from _Sean A. Irvine_, Dec 03 2009