OFFSET
1,1
COMMENTS
A positive integer x is called k-transposable if when the leftmost digit is moved into the units place, the result is equal to kx.
A number is 1-transposable iff its digits are all the same.
Kahan shows that if k>1 then k must be 3 and the only solutions are concatenations of copies of either 142857 or 285714, as given in this sequence, which therefore lists all k-transposable numbers with k>1.
LINKS
N. J. A. Sloane, Table of n, a(n) for n = 1..20
S. Kahan, k-transposable integers, Math. Mag., 49 (1976), 27-28.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
N. J. A. Sloane, Dec 14 2008
STATUS
approved