A115542 Numbers k such that k^2 is the concatenation of two numbers 5*m and m.

7142857142857142857143, 14285714285714285714286, 21428571428571428571429, 730337078651685393258426966292134831460674157303370786517

Offset

1,1

Links

Table of n, a(n) for n=1..4.

Example

7142857142857142857143^2 = 5102040816326530612245_1020408163265306122449.

Crossrefs

Cf. A102567, A106497, A115527 - A115556.

Sequence in context: A337094 A076335 A280301 * A343266 A330009 A171265

Adjacent sequences: A115539 A115540 A115541 * A115543 A115544 A115545

Keyword

nonn,base

Author

Giovanni Resta, Jan 25 2006

Extensions

Definition modified by Georg Fischer, Jul 26 2019

Status

approved