OFFSET
1,1
LINKS
Zhao Hui Du, Table of n, a(n) for n = 1..45
MATHEMATICA
Select[Flatten[Table[FromDigits/@Tuples[{4, 8, 9}, n], {n, 10}]], IntegerQ[ Sqrt[#]]&] (* The program generates the first 11 terms of the sequence. To generate all of the shown terms, increase the "n" constant from 10 to 18 but the program will take a long time to run. *) (* Harvey P. Dale, Jan 11 2019 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Mar 15 2000
STATUS
approved