|
|
A077675
|
|
Squarefree numbers with square nonzero square digits.
|
|
1
|
|
|
11, 14, 19, 41, 89, 91, 94, 111, 114, 118, 119, 141, 149, 181, 191, 194, 199, 411, 418, 419, 449, 481, 489, 491, 494, 498, 499, 811, 814, 818, 849, 881, 889, 894, 898, 899, 911, 914, 919, 941, 949, 989, 991, 994, 998, 1111, 1114, 1118, 1119, 1141, 1149
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
LINKS
|
|
|
MATHEMATICA
|
Select[Flatten[Table[FromDigits/@Tuples[{1, 4, 8, 9}, n], {n, 2, 4}]], SquareFreeQ] (* Harvey P. Dale, Oct 10 2013 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
base,nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|