OFFSET
1,7
COMMENTS
The radius of a tree is the maximal distance of a node from the center.
LINKS
Peter Steinbach, Field Guide to Simple Graphs, Volume 3, Part 8 (For Volumes 1, 2, 3, 4 of this book see A000088, A008406, A000055, A000664, respectively.)
FORMULA
EXAMPLE
Triangle begins:
0,
1,
1,
1, 1,
1, 2,
1, 4, 1,
1, 7, 3,
1, 11, 10, 1,
1, 17, 25, 4,
1, 25, 61, 18, 1,
1, 36, 132, 61, 5,
1, 50, 277, 194, 28, 1,
...
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
N. J. A. Sloane, Mar 19 2017
STATUS
approved