[math-fun] divisor chains counts fixed

[Richard Guy]

The sequence fans have got left out of the loop, and
my original intention was to put a sequence in the OEIS.

There are two sequences -- one for the numbers of chains
of length  n,  starting with  n,  and one for the
numbers of chains of length  n  with any start.    R.

On Mon, 3 May 2004, Chris Landauer wrote:

> 
> hihi, all -
> 
> oops - my program did not count sequences in which one of the terms was equal
> to the sum of the previous terms (< instead of <= in the loop condition 8-()
> 
> anyway, here are the revised counts
> 1 chains of length 1
> 1 chains of length 2
> 2 chains of length 3
> 2 chains of length 4
> 4 chains of length 5
> 5 chains of length 6
> 7 chains of length 7
> 7 chains of length 8
> 24 chains of length 9
> 22 chains of length 10
> 29 chains of length 11
> 39 chains of length 12
> 67 chains of length 13
> 55 chains of length 14
> 386 chains of length 15
> 235 chains of length 16
> 312 chains of length 17
> 347 chains of length 18
> 451 chains of length 19
> 1319 chains of length 20
> 5320 chains of length 21
> 3220 chains of length 22
> 4489 chains of length 23
> 20237 chains of length 24
> 36580 chains of length 25
> 52875 chains of length 26
> 197103 chains of length 27
> 
> more soon,
> cal
> 
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