A055157 n has distinct digits and n=a-b where a has the digits of n in descending order and b has the digits of n in ascending order (perhaps with leading zeros).

495, 6174, 97508421, 864197532, 9753086421

Offset: 0

Author

Henry Bottomley, Apr 27 2000

Keywords

• nonn
• base
• fini
• full

Examples

			495 = 954-459.
		

Links

• Dennis Borris, Identity by Ordered Subtraction, Ken Duisenberg's Puzzle of the Week, April 20, 2000.

Crossrefs

Cf. A055158, A055159, A055160.

Formula

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