A052526
Jon Perry
perry at globalnet.co.uk
Sat Feb 15 02:06:58 CET 2003
'Non-planar labeled trees with neither unary nor binary nodes.
Comments: The definition does not make sense. Every tree is planar. Every
finite
tree has nodes with degree 1. '
Good point. Either the setter is completely wrong, or Neil is...
Jon Perry
perry at globalnet.co.uk
http://www.users.globalnet.co.uk/~perry/maths/
http://www.users.globalnet.co.uk/~perry/DIVMenu/
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