OFFSET
1,2
COMMENTS
This sequence contains palindromic squares and palindromic squares with trailing zeros. Are 2178 and 8721 the only non-palindromic reversible pair in this sequence without trailing zeros?
LINKS
Chai Wah Wu, Table of n, a(n) for n = 1..108
EXAMPLE
2178 = 2*9*121 and 8712 = 8*9*121, 2718*8712 = (2*3*11)^4.
MATHEMATICA
Select[Range[1000000], IntegerQ[(#*FromDigits[Reverse[IntegerDigits[ # ]]])^(1/4)] &]
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Tanya Khovanova, Sep 17 2007
EXTENSIONS
a(20)-a(31) from Donovan Johnson, Oct 27 2008
STATUS
approved