OFFSET
1,2
COMMENTS
This sequence is not a permutation of the integers which is self-inverse. But is it a permutation?
MATHEMATICA
f[n_] := BitXor[n, Floor[ Log[2, n]]]; Array[f, 75];
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Robert G. Wilson v, Jun 09 2010
STATUS
approved