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A247262
Positive squares not ending in 00 that remain squares when prefixed with 100.
5
126609965386962890625, 2251582387232059478759765625, 35195816356873080847263336181640625, 507081064881263080149056017398834228515625, 6906141992927910623080625169910490512847900390625, 90266080419142123943961730174907133914530277252197265625
OFFSET
1,1
COMMENTS
Squares of A247312.
LINKS
EXAMPLE
126609965386962890625 and 100126609965386962890625 are both squares.
PROG
(PARI)
for(n=1, 10^30, if(n^2%100&&issquare(10^(#Str(n^2)+2)+n^2), print1(n^2, ", "))) \\ Derek Orr, Sep 13 2014
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Chai Wah Wu, Sep 10 2014
STATUS
approved