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A115528 Numbers k such that k^2 is the concatenation of two numbers m and 2*m. 2
6, 28571428571428571428572, 42857142857142857142858, 57142857142857142857144, 2247191011235955056179775280898876404494382022471910112360 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
6^2 = 3_6.
CROSSREFS
Sequence in context: A182795 A182796 A079683 * A354995 A270032 A340980
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Jan 25 2006
STATUS
approved

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Last modified March 28 14:38 EDT 2024. Contains 371254 sequences. (Running on oeis4.)