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A115543
Numbers k such that the concatenation of k with 6*k gives a square.
0
1, 20408163265306122448979591836734694, 81632653061224489795918367346938776, 20408163265306122448979591836734693877551020408163265306122448979591836734694
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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:
A074194
A135386
A095462
*
A219323
A272521
A361899
Adjacent sequences:
A115540
A115541
A115542
*
A115544
A115545
A115546
KEYWORD
nonn
,
base
,
less
AUTHOR
Giovanni Resta
, Jan 25 2006
STATUS
approved
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Last modified March 28 05:02 EDT 2024. Contains 371235 sequences. (Running on oeis4.)