A180408 - OEIS

A180408

Nonzero digits not used in n.

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

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OFFSET

0,1

LINKS

Table of n, a(n) for n=0..26.

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 *)