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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(6) >= 10^50. - Hiroaki Yamanouchi, Nov 22 2014

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

1390^2 = 1932100, 4193210025 = 64755^2.

CROSSREFS

Cf. A249968, A249969, A249971.

Sequence in context: A281164 A250816 A031983 * A069422 A202050 A236520

Adjacent sequences:  A249967 A249968 A249969 * A249971 A249972 A249973

KEYWORD

nonn,base,more

AUTHOR

Chai Wah Wu, Nov 18 2014

STATUS

approved

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Last modified July 26 10:35 EDT 2021. Contains 346294 sequences. (Running on oeis4.)