A074158 Smallest multiple of n which begins with the concatenation of first n natural numbers.

1, 12, 123, 12340, 12345, 123456, 12345676, 123456784, 123456789, 12345678910, 12345678910114, 123456789101112, 1234567891011121303, 12345678910111213142, 123456789101112131415, 123456789101112131415168

Offset

1,2

Links

Table of n, a(n) for n=1..16.

Example

a(7) = 12345676 = 1763668*7 which starts with 1234567.

Crossrefs

Sequence in context: A226737 A077306 A117640 * A071269 A061088 A176556

Adjacent sequences: A074155 A074156 A074157 * A074159 A074160 A074161

Keyword

base,nonn

Author

Amarnath Murthy, Aug 29 2002

Extensions

More terms from Sascha Kurz, Jan 15 2003

Status

approved