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A105429 Numbers k such that square root of k contains the reverse of k as a string of digits to the immediate right of the decimal point (excluding leading zeros). 1
8, 77, 98, 1439, 179848, 2723643, 3522548, 6428805, 805039212, 37574751287, 536098097002, 927422715988 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(11) > 2*10^11. If terms ending in 0 were allowed, then 3970 and 5490 would be terms, since sqrt(3970) = 63.00793... and sqrt(5490) = 74.0945... . - Giovanni Resta, Aug 08 2019

a(13) > 10^12. - Mauro Simonato, Sep 25 2021

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

a(5)=179848 because the square root of 179848 (whose reverse is 848971) = 424.08489716...

CROSSREFS

Cf. A074841.

Sequence in context: A251927 A024281 A232087 * A225348 A091686 A091691

Adjacent sequences:  A105426 A105427 A105428 * A105430 A105431 A105432

KEYWORD

nonn,base,more

AUTHOR

Gil Broussard, Apr 08 2005

EXTENSIONS

a(9)-a(10) from Giovanni Resta, Aug 08 2019

a(11)-a(12) from Mauro Simonato, Sep 25 2021

STATUS

approved

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Last modified October 21 02:29 EDT 2021. Contains 348141 sequences. (Running on oeis4.)