OFFSET
1,2
LINKS
Charles R Greathouse IV, Table of n, a(n) for n = 1..10000
MATHEMATICA
Select[Range[500], DigitCount[#, 10, 0]==0&&IntegerQ[Sqrt[Times@@ IntegerDigits[ #]]]&] (* Harvey P. Dale, Jun 09 2020 *)
PROG
(Magma) [ n: n in [1..350] | s gt 0 and IsSquare(s) where s is &*Intseq(n, 10) ]; // Bruno Berselli, May 26 2011
(PARI) is(n)=my(v=digits(n), pr=prod(i=1, #v, v[i])); pr&&issquare(pr) \\ Charles R Greathouse IV, May 19 2013
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Jun 15 1999
STATUS
approved