A094224 Number of digits in the least n-transposable number.
18, 28, 6, 6, 58, 22, 13, 44
Offset: 2
Examples
We have the a(4)=6-digit 4-transposable number 410256=4*102564, and the a(5)=6-digit 5-transposable number 714285=5*142857.
References
- P. Tougne, "Jeux Mathématiques", Prob. 8, pp. 104 and 107 Aug. 1982 issue of Pour La Science (French edition of 'Scientific American'), Paris.
Crossrefs
Cf. A092697 (value of the least n-transposable number).
Extensions
Incorrect comments and program removed by Alois P. Heinz, Feb 18 2020
Comments