A115528 Numbers k such that k^2 is the concatenation of two numbers m and 2*m.

6, 28571428571428571428572, 42857142857142857142858, 57142857142857142857144, 2247191011235955056179775280898876404494382022471910112360

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 * A354995 A270032 A340980

Adjacent sequences: A115525 A115526 A115527 * A115529 A115530 A115531

Keyword

nonn,base

Author

Giovanni Resta, Jan 25 2006

Status

approved