Although the sequences have very similar definitions, A254077 is a mystery while A255582 is easily shown to be a permutation of the natural numbers.
Table of n, a(n) for n=0..66.
Cf. A098550, A254077, A255582.
Sequence in context: A088001 A260946 A019091 * A070650 A107781 A107772
Adjacent sequences: A256971 A256972 A256973 * A256975 A256976 A256977
N. J. A. Sloane, Apr 22 2015