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A249970
Numbers whose squares remain squares when prepended with 4 and appended with 25 in base 10.
5
1390, 3055334, 28638619086007684802380, 296356838660564717696928980, 296450546123962656267474730
OFFSET
1,1
COMMENTS
a(6) >= 10^50. - Hiroaki Yamanouchi, Nov 22 2014
EXAMPLE
1390^2 = 1932100, 4193210025 = 64755^2.
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
Chai Wah Wu, Nov 18 2014
STATUS
approved