A115554 Numbers k such that k^2 is the concatenation of two numbers m and 9*m.

14287, 28574, 15384615384615386, 23076923076923079, 30769230769230772, 14285714285714285714285714285714285714285714287, 28571428571428571428571428571428571428571428574

Offset

1,1

Links

Table of n, a(n) for n=1..7.

Example

14287^2 = 2041_18369.

Crossrefs

Cf. A102567, A106497, A115527 - A115556.

Sequence in context: A232263 A034232 A233889 * A106726 A064965 A072890

Adjacent sequences: A115551 A115552 A115553 * A115555 A115556 A115557

Keyword

nonn,base

Author

Giovanni Resta, Jan 25 2006

Status

approved