A247262 Positive squares not ending in 00 that remain squares when prefixed with 100.

126609965386962890625, 2251582387232059478759765625, 35195816356873080847263336181640625, 507081064881263080149056017398834228515625, 6906141992927910623080625169910490512847900390625, 90266080419142123943961730174907133914530277252197265625

Offset

1,1

Comments

Squares of A247312.

Links

Chai Wah Wu, Table of n, a(n) for n = 1..85

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

Cf. A247261, A247263, A247264, A247312.

Sequence in context: A104840 A290156 A095436 * A046061 A181790 A252504

Adjacent sequences: A247259 A247260 A247261 * A247263 A247264 A247265

Keyword

nonn,base

Author

Chai Wah Wu, Sep 10 2014

Status

approved