OFFSET
1,1
COMMENTS
Also column 5 of A059897.
A self-inverse permutation of the positive integers with no fixed points that swaps pairs of integers whose ratio is 1:5.
LINKS
MAPLE
a:= n-> `if`(padic[ordp](n, 5)::odd, n/5, n*5):
seq(a(n), n=1..60);
CROSSREFS
KEYWORD
nonn
AUTHOR
Peter Munn and N. J. A. Sloane, Mar 29 2019
EXTENSIONS
More terms from Alois P. Heinz, Mar 31 2019
STATUS
approved