A072725 Integers which are exactly the concatenation of the first m numbers (A007908) divided by their sum (A000217 = m*(m+1)/2).

1, 4, 823

Offset: 1

Author

Henry Bottomley, Jul 06 2002

Keywords

• base
• nonn
• bref

Comments

A probability argument suggests that this sequence may be finite.

Examples

			a(1) = 1/1 =1; a(2) = 12/(1+2) = 4; a(3) = 12345/(1+2+3+4+5).
		

Crossrefs

Cf. A067116, A072723, A072724.