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

1,2

Links

Table of n, a(n) for n=1..16.

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.

Crossrefs

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

Sequence in context: A036308 A066444 A206466 * A175111 A115190 A231706

Adjacent sequences: A137431 A137432 A137433 * A137435 A137436 A137437

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