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A115555 Numbers k such that the concatenation of 9*k with k gives a square. 1
1836734693877551020408163265306122449, 7346938775510204081632653061224489796, 15311909262759924385633270321361058601134215500945179584121, 27221172022684310018903591682419659735349716446124763705104 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

CROSSREFS

Cf. A102567, A106497, A115527 - A115556.

Sequence in context: A003854 A003847 A095466 * A217419 A246289 A095468

Adjacent sequences:  A115552 A115553 A115554 * A115556 A115557 A115558

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Jan 25 2006

STATUS

approved

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Last modified July 1 12:30 EDT 2022. Contains 354973 sequences. (Running on oeis4.)