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A115530
Numbers k such that k^2 is the concatenation of two numbers 2*m and m.
0
5714285714285714286, 8571428571428571429, 11428571428571428572, 465116279069767441860465116279070, 511627906976744186046511627906977, 558139534883720930232558139534884, 604651162790697674418604651162791
OFFSET
1,1
EXAMPLE
5714285714285714286^2 = 3265306122448979592_1632653061224489796.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Jan 25 2006
EXTENSIONS
Definition modified by Georg Fischer, Jul 25 2019
STATUS
approved