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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). 2
1, 121, 3721, 13924, 135424, 1236544, 13527684, 13527684, 139854276, 11738205649, 10112819764356, 1011123678945241, 10118426359171321, 10111134329645378121, 1011111632116847554329, 10111124953183456116721, 1011111119736855441726321, 101111112641746351915327881, 10111111111271587168434259369 (list; graph; refs; listen; history; text; internal format)
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

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Last modified June 5 15:37 EDT 2020. Contains 334852 sequences. (Running on oeis4.)