A056787

[Jim Nastos]

On Sat, 15 Feb 2003, Jon Perry wrote:

> 'Have you tried emailing the sequence author?'
> 
> No, but it is listed as obscure.

  So? It doesn't mean that it needs you to mention that you would like to 
see a definition. It provides a link (to 
http://alpha.ujep.cz/~vicher/puzzle/polyforms.htm) which mentions this 
"tree graphs with diagonals" and if maintained by Miroslav Vicher who has 
an email address miroslav at vicher.cz who could probably provide a 
definition (which I'm guessing is the number of "trees" 
(acyclic/connected) formed by polyominoes while allowing diagonal 
connections.
  I assume you were really curious about the definition, so try emailing 
him. If you really weren't all that serious about wanting to know, then 
this isn't the appropriate place for the comment. And if you are going to 
give a report about a bunch of obscure sequences, you could write it all 
up into one file and send that to the list instead of 10 emails. Also, 
providing a cut-and-pasteof the obscure definition could be useful for the 
mailing list, rather than to just mention the sequence number in your 
subject line.

Jim Nastos