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.

1, 5, 7, 85, 93, 119, 127, 21845, 21973, 23901, 24029, 30583, 30711, 32639, 32767, 1431655765, 1431688533, 1440044501, 1440077269, 1566399837, 1566432605, 1574788573, 1574821341, 2004318071, 2004350839, 2012706807, 2012739575

Offset: 1

Author

Leroy Quet, Sep 26 2009

Keywords

• base
• nonn

Comments

Each term is a palindrome when written in base 2.

Crossrefs

Cf. A165785

Extensions

More terms from Sean A. Irvine, Dec 03 2009