[seqfan] Re: nXk sums of pairs of neighbor values = {0..number of neighbors} ?

Ron Hardin rhhardin at att.net
Wed Dec 28 12:52:23 CET 2011


1 5 6
1 0 4
8 0 3

The 6 generates 6+5 =11 and 6+4=10, the last two of the sums==0..11, each of 
which appears once, there being 12 adjacent pairs to sum and hence the 12 
different values 0..11.

 rhhardin at mindspring.com
rhhardin at att.net (either)



----- Original Message ----
> From: Ed Jeffery <lejeffery7 at gmail.com>

> In your example for n=3, k=3, the  fifth matrix you listed is
> 
> [1,5,6; 1,0,4; 8,0,3],
> 
> and I wonder why  you chose 6 for the rightmost entry in row 1? (It seems
> like any one of  {6,7,8,9} would be valid.)



More information about the SeqFan mailing list