A164862 a(n) is the smallest positive integer that, when written in binary, contains the binary representations of both A164861(n) and the reversal of the order of the digits of A164861(n) as (overlapping) substrings.

27, 27, 51, 93, 51, 93, 99, 165, 231, 165, 107, 189, 99, 107, 119, 231, 119, 189, 195, 325, 455, 843, 717, 633, 325, 1619, 471, 717, 219, 381, 195, 1619, 231, 843, 219, 495, 455, 231, 471, 633, 495, 381, 387, 645, 903, 1161, 1675, 1421, 1935, 1161, 403, 1193

Offset

1,1

Comments

Every integer that occurs in this sequence occurs at least twice.

Links

Table of n, a(n) for n=1..52.

Example

The second odd non-binary-palindrome is 13, which is 1101 in binary. The smallest positive integer that, when written in binary, contains both 1101 and its reverse (1011) is 27, which is 11011 in binary.

Crossrefs

Cf. A164861.

Sequence in context: A219235 A010866 A291516 * A040703 A022361 A238370

Adjacent sequences: A164859 A164860 A164861 * A164863 A164864 A164865

Keyword

base,nonn

Author

Leroy Quet, Aug 28 2009

Extensions

Extended by Ray Chandler, Mar 14 2010

Status

approved