OFFSET
1,1
COMMENTS
a(n) == 5 or 9 (mod 10). - Chai Wah Wu, Nov 30 2018
LINKS
Zhao Hui Du, Table of n, a(n) for n = 1..26
MATHEMATICA
Flatten[Table[Select[FromDigits /@ Tuples[{2, 5, 9}, n], IntegerQ[Sqrt[#]] &], {n, 6}]] (* Amiram Eldar, Nov 30 2018 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Mar 15 2000
EXTENSIONS
One more term from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 14 2005
STATUS
approved