OFFSET
1,6
COMMENTS
Repunits in base n are an upper bound, since 11...11^2 = 12...(k)...21 in any sufficiently large base.
EXAMPLE
Row 10: 0,1,11,111,2,5,4,24,9,3, has squares 0,1,121,12321,4,25,16,576,81,9, with digits 0,...,9 as the respective largest digits.
CROSSREFS
KEYWORD
AUTHOR
Franklin T. Adams-Watters, Oct 23 2006
STATUS
approved