OFFSET
0,3
COMMENTS
A fixed point is a vertex with a self loop. An isolated point is a vertex that is not joined to any other vertex.
LINKS
T. D. Noe, Table of n, a(n) for n = 0..101
MATHEMATICA
t=Sum[n^(n-1)x^n/n!, {n, 1, 20}]; Range[0, 20]! CoefficientList[Series[x(Log[1/(1-t)]+1), {x, 0, 20}], x]
CROSSREFS
KEYWORD
nonn
AUTHOR
Geoffrey Critzer, Nov 16 2011
STATUS
approved