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A055159
n has distinct digits in ascending order and n=a-b where a has the digits of n in descending order and b has the digits of n in another order (a and b perhaps with extra zeros).
3
459, 1467, 1245789, 123456789, 123456789
OFFSET
0,1
REFERENCES
Denis Borris, Ken Duisenberg's Puzzle of the Week, April 20, 2000
FORMULA
a(n)=A055158(n)-A055157(n)
EXAMPLE
459=954-495
CROSSREFS
Cf. A055162.
Sequence in context: A224456 A121970 A055162 * A124694 A227754 A253527
KEYWORD
fini,full,base,nonn
AUTHOR
Henry Bottomley, Apr 27 2000
STATUS
approved