A094333 a(1) = 1, a(n) = least proper multiple of a(n-1) which is a concatenation of successive numbers. Terms with more than one digit must be a concatenation of at least two successive numbers.

1, 2, 4, 8, 56, 5152, 17181920, 479839479840, 552587148319552587148320, 370210294386175240152319370210294386175240152320

Offset: 1

Author

Amarnath Murthy, May 16 2004

Keywords

• base
• nonn

Examples

			a(3) = 4 is the smallest proper multiple of 2 which is a concatenation of a (single) number.
a(5) = 56 and a(6) = 5152 =56*92 is the concatenation of 51 and 52.
		

Links

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

Crossrefs

Cf. A035333, A094334, A225796.

Extensions

a(7), a(8) from D. S. McNeil, Mar 23 2009

a(9) from Donovan Johnson, Mar 09 2011

a(10) from Paul Tek, Jul 27 2013