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A247312 Positive numbers not divisible by 10 whose squares remain squares when prefixed with 100. 3
11252109375, 47450841796875, 187605480615234375, 712096246922607421875, 2627953955633148193359375, 9500846300153588104248046875, 29357159521824837441192448139190673828125, 80932484400013426603726400434970855712890625, 218326368611836548856645001359283924102783203125 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Square roots of A247262.

LINKS

Chai Wah Wu, Table of n, a(n) for n = 1..168

EXAMPLE

11252109375^2 = 126609965386962890625 and 100126609965386962890625 is square.

CROSSREFS

Cf. A247261, A247262, A247263, A247264.

Sequence in context: A038453 A290390 A183709 * A204780 A333131 A172587

Adjacent sequences:  A247309 A247310 A247311 * A247313 A247314 A247315

KEYWORD

nonn

AUTHOR

Chai Wah Wu, Sep 13 2014

STATUS

approved

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Last modified October 26 14:28 EDT 2021. Contains 348267 sequences. (Running on oeis4.)