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A115528 Numbers n such that the square of n 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

Table of n, a(n) for n=1..5.

EXAMPLE

6^2 = 3_6.

CROSSREFS

Cf. A102567, A106497, A115527 - A115556.

Sequence in context: A182795 A182796 A079683 * A270032 A305671 A228633

Adjacent sequences:  A115525 A115526 A115527 * A115529 A115530 A115531

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Jan 25 2006

STATUS

approved

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Last modified September 21 17:46 EDT 2019. Contains 327273 sequences. (Running on oeis4.)