OFFSET
1,2
COMMENTS
Since a(13) < a(12), a(13) is actually the smallest nontrivial square with at least 12 identical adjacent digits (cf. A169859), while a(12) is the smallest containing 12, but not more than 12, identical adjacent digits. - Jon E. Schoenfield, May 16 2010
a(n) >= A169859(n) with equality taking place when A169859(n) contains exactly n identical adjacent digits. - Max Alekseyev, Dec 29 2024
EXAMPLE
a(3) = 1444 because it has 3 adjacent 4's, and no square less than 1444 has 3 adjacent digits which are the same.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Randy L. Ekl, Apr 15 2008
EXTENSIONS
a(11) from Donovan Johnson, May 08 2010
a(12)-a(14) from Jon E. Schoenfield, May 16 2010
a(15)-a(18) from Max Alekseyev, Dec 29 2024
STATUS
approved