OFFSET
1,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..2000
MATHEMATICA
Flatten[Table[FromDigits[#, 14]&/@Tuples[{1, 4}, n], {n, 6}]] (* Vincenzo Librandi, May 26 2012 *)
PROG
(Magma) [n: n in [1..280000] | Set(IntegerToSequence(n, 14)) subset {1, 4}]; // Vincenzo Librandi, May 26 2012
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
STATUS
approved