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A072725 Integers which are exactly the concatenation of the first m numbers (A007908) divided by their sum (A000217 = m*(m+1)/2). 2
1, 4, 823 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A probability argument suggests that this sequence may be finite.

LINKS

Table of n, a(n) for n=1..3.

EXAMPLE

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

CROSSREFS

Cf. A067116, A072723, A072724.

Sequence in context: A239623 A202685 A172893 * A176186 A221232 A272167

Adjacent sequences:  A072722 A072723 A072724 * A072726 A072727 A072728

KEYWORD

base,nonn,bref

AUTHOR

Henry Bottomley, Jul 06 2002

STATUS

approved

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Last modified November 15 14:03 EST 2018. Contains 317239 sequences. (Running on oeis4.)