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A115545
Numbers k such that the concatenation of 6*k with k gives a square.
0
122449, 489796, 122448979591836734693877551020408163265306122449, 489795918367346938775510204081632653061224489796
OFFSET
1,1
EXAMPLE
734694_122449 = 857143^2.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Jan 25 2006
STATUS
approved