A115543 Numbers k such that the concatenation of k with 6*k gives a square.

1, 20408163265306122448979591836734694, 81632653061224489795918367346938776, 20408163265306122448979591836734693877551020408163265306122448979591836734694

Offset

1,2

Links

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

Example

1_6 = 4^2.

Crossrefs

Cf. A102567, A106497, A115527 - A115556.

Sequence in context: A135386 A378477 A095462 * A219323 A272521 A361899

Adjacent sequences: A115540 A115541 A115542 * A115544 A115545 A115546

Keyword

nonn,base,less

Author

Giovanni Resta, Jan 25 2006

Status

approved