A069600 Smallest square containing all the digits of numbers from 1 to n. For a(10) and higher, all duplicated digits must be in the term (for example a(10) has two 1's).
1, 121, 3721, 13924, 135424, 1236544, 13527684, 13527684, 139854276, 11738205649, 10112819764356, 1011123678945241, 10118426359171321, 10111134329645378121, 1011111632116847554329, 10111124953183456116721, 1011111119736855441726321, 101111112641746351915327881, 10111111111271587168434259369
Offset: 1
Examples
a(5) = 335241 = 579^2 contains digits 1,2,3,4 and 5.
Crossrefs
Cf. A088628.
Extensions
Corrected and extended by Larry Reeves (larryr(AT)acm.org), Jan 20 2003
a(14)-a(15) from Giovanni Resta, Aug 06 2019
a(16)-a(19) from Chai Wah Wu, May 18 2020