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A115555
Numbers k such that the concatenation of 9*k with k gives a square.
1
1836734693877551020408163265306122449, 7346938775510204081632653061224489796, 15311909262759924385633270321361058601134215500945179584121, 27221172022684310018903591682419659735349716446124763705104
OFFSET
1,1
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Jan 25 2006
STATUS
approved