OFFSET
1,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..700
EXAMPLE
a(2)=39, 39^4 = 2313441, (2! + 3! + 1! + 3! + 4! + 4! + 1!) = 64 = 8^2.
MAPLE
a:=proc(n) local nn: nn:=convert(n^4, base, 10): if type(sqrt(add(nn[j]!, j=1..nops(nn))), integer)=true then n else fi end: seq(a(n), n=1..32000); # Emeric Deutsch, Mar 06 2007
MATHEMATICA
Select[Range[26000], IntegerQ[Sqrt[Total[IntegerDigits[#^4]!]]]&] (* Harvey P. Dale, Feb 22 2011 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Yalcin Aktar, Mar 02 2007
EXTENSIONS
More terms from Emeric Deutsch, Mar 06 2007
Name changed by Franklin T. Adams-Watters, Mar 29 2014
STATUS
approved