A087342 Smallest multiple of n which is the concatenation of n successive numbers in descending order, or 0 if no such number exists.

1, 32, 321, 5432, 98765, 765432, 22212019181716, 98765432, 987654321, 19181716151413121110, 2019181716151413121110, 1312111098765432, 19181716151413121110987, 2928272625242322212019181716

Offset

1,2

Links

Table of n, a(n) for n=1..14.

Example

a(7) = 22212019181716 is the concatenation of 22,21,20,19,18,17 and 16 and is divisible by 7.

Crossrefs

Cf. A087343.

Sequence in context: A239422 A165008 A095152 * A083468 A125395 A126553

Adjacent sequences: A087339 A087340 A087341 * A087343 A087344 A087345

Keyword

base,nonn

Author

Amarnath Murthy, Sep 06 2003

Extensions

More terms from David Wasserman, May 10 2005

Status

approved