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

1,2

Comments

Each term is a palindrome when written in base 2.

Links

Table of n, a(n) for n=1..27.

Crossrefs

Cf. A165785

Sequence in context: A351636 A062583 A196139 * A329006 A176619 A230379

Adjacent sequences: A165781 A165782 A165783 * A165785 A165786 A165787

Keyword

base,nonn

Author

Leroy Quet, Sep 26 2009

Extensions

More terms from Sean A. Irvine, Dec 03 2009

Status

approved