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A137434
a(n) = smallest square containing n copies of the same nonzero digit.
0
1, 121, 1444, 44944, 6441444, 47444544, 4434494464, 44424414441, 1113111511681, 22222220262025, 444431244445444, 22292262226224225, 441544444344443449, 1113101111111117041, 2222222222222640225, 11111119101145491111121
OFFSET
1,2
EXAMPLE
a(9) = 1113111511681 because there is no smaller square number with 9 copies of the same nonzero digit. a(9) has 9 1's.
KEYWORD
nonn,base,more
AUTHOR
Randy L. Ekl, Apr 17 2008
EXTENSIONS
Edited by N. J. A. Sloane at the suggestion of Jon E. Schoenfield, Jan 11 2009
a(12)-a(15) from Jon E. Schoenfield, Jan 14 2009
a(16) from Jon E. Schoenfield, Jan 17 2009
STATUS
approved