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A109688 Smallest square that contains exactly n occurrences of the string n. 0
1, 1, 225, 343396, 44944, 505575225, 4666665969, 77770707876, 388888184881, 9499999990849 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..9.

EXAMPLE

a(2)=225=15^2 since this is the first square that contains two 2's.

MATHEMATICA

With[{sqs=Range[0, 3100000]^2}, Flatten[Table[Select[sqs, DigitCount[#, 10, n] == n&, 1], {n, 9}]]] (* Harvey P. Dale, May 04 2012 *)

CROSSREFS

Sequence in context: A171109 A239478 A304314 * A195277 A319944 A013757

Adjacent sequences:  A109685 A109686 A109687 * A109689 A109690 A109691

KEYWORD

base,more,nonn

AUTHOR

Erich Friedman, Aug 07 2005

EXTENSIONS

Corrected and extended by Giovanni Resta, Apr 05 2006

STATUS

approved

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Last modified January 21 14:32 EST 2022. Contains 350479 sequences. (Running on oeis4.)