OFFSET
1,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..200
MATHEMATICA
fQ[n_]:=Union@Join[{1, 4}, IntegerDigits[n, 11]]=={1, 4}; Select[Range[0, 80000], fQ] (* Vincenzo Librandi, May 25 2012 *)
Flatten[Table[FromDigits[#, 11]&/@Tuples[{1, 4}, n], {n, 5}]] (* Harvey P. Dale, Feb 28 2015 *)
PROG
(Magma) [n: n in [1..21000] | Set(IntegerToSequence(n, 11)) subset {1, 4}]; // Bruno Berselli, May 25 2012
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
STATUS
approved