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

1,2

Links

Table of n, a(n) for n=1..19.

Example

a(5) = 335241 = 579^2 contains digits 1,2,3,4 and 5.

Crossrefs

Cf. A088628.

Sequence in context: A264495 A206629 A014758 * A244065 A231649 A212802

Adjacent sequences: A069597 A069598 A069599 * A069601 A069602 A069603

Keyword

nonn,base,more

Author

Amarnath Murthy, Mar 25 2002

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

Status

approved