The largest integer that, when written in binary, occurs as a substring both in binary n and in binary a(n) is A175301(n).
Table of n, a(n) for n=1..16.
Sequence in context: A161750 A249400 A226896 * A288521 A067940 A230286
Adjacent sequences: A175299 A175300 A175301 * A175303 A175304 A175305
Leroy Quet, Mar 24 2010