A137434 a(n) = smallest square containing n copies of the same nonzero digit.

1, 121, 1444, 44944, 6441444, 47444544, 4434494464, 44424414441, 1113111511681, 22222220262025, 444431244445444, 22292262226224225, 441544444344443449, 1113101111111117041, 2222222222222640225, 11111119101145491111121

Offset: 1

Author

Randy L. Ekl, Apr 17 2008

Keywords

• nonn
• base
• more

Examples

			a(9) = 1113111511681 because there is no smaller square number with 9 copies of the same nonzero digit. a(9) has 9 1's.
		

Crossrefs

Cf. A036508, A036509, A036510, A036511, A036512, A036513, A036514, A036515, A036516. - Jon E. Schoenfield, Jan 14 2009

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