OFFSET
0,1
COMMENTS
n=16 column of Table 1.1, p.9, Mohammad-Noori. Histogram of the number of closed walks for n = 16, 32, 64.
The algebraic area is a signed quantity, and can become zero for self-intersecting paths.
LINKS
Morteza Mohammad-Noori, Enumeration of closed random walks in the square lattice according to their areas, arXiv:1012.3720, Dec 16, 2010.
FORMULA
a(0) + 2*Sum_{n>0} a(n) = A002894(8).
CROSSREFS
KEYWORD
nonn,walk
AUTHOR
Jonathan Vos Post, Dec 16 2010
STATUS
approved