0,1

Self-inverse when considered as a permutation or function, i.e., a(a(n)) = n.

Table of n, a(n) for n=0..70.

Index entries for sequences that are permutations of the natural numbers

Sequence in context: A325490 A123514 A064178 * A004580 A215451 A154585

Adjacent sequences: A018217 A018218 A018219 * A018221 A018222 A018223

nonn

Michael Kleber

Edited and extended by Christian G. Bower, Oct 29 2002

approved