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A180408
Nonzero digits not used in n.
0
123456789, 23456789, 13456789, 12456789, 12356789, 12346789, 12345789, 12345689, 12345679, 12345678, 23456789, 23456789, 3456789, 2456789, 2356789, 2346789, 2345789, 2345689, 2345679, 2345678, 13456789, 3456789, 13456789, 1456789, 1356789, 1346789, 1345789
OFFSET
0,1
FORMULA
a(n) = 123456789 after removing any digits that appear in n. If n uses all digits, then a(n) = 0.
EXAMPLE
a(13) = 123456789 without 1 and 3 = 2456789.
a(123456789) = 0 (by definition).
MATHEMATICA
newn[n_]:=FromDigits[Complement[Range[9], IntegerDigits[n]]]; Table[newn[i], {i, 50}] (* Harvey P. Dale, Nov 21 2010 *)
CROSSREFS
Sequence in context: A224780 A367595 A277057 * A050289 A372708 A204140
KEYWORD
easy,nonn,base
AUTHOR
Dominick Cancilla, Sep 02 2010
EXTENSIONS
More terms from Harvey P. Dale, Nov 21 2010
STATUS
approved