

A055157


n has distinct digits and n=ab where a has the digits of n in descending order and b has the digits of n in ascending order (perhaps with leading zeros).


3




OFFSET

0,1


LINKS

Table of n, a(n) for n=0..4.
Dennis Borris, Identity by Ordered Subtraction, Ken Duisenberg's Puzzle of the Week, April 20, 2000.


FORMULA

a(n) = A055158(n)  A055159(n).


EXAMPLE

495 = 954459.


CROSSREFS

Cf. A055158, A055159, A055160.
Sequence in context: A151957 A099009 A055160 * A027808 A104478 A133352
Adjacent sequences: A055154 A055155 A055156 * A055158 A055159 A055160


KEYWORD

nonn,base,fini,full


AUTHOR

Henry Bottomley, Apr 27 2000


STATUS

approved



