OFFSET
1,2
COMMENTS
Column 5 of A220652
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..136
EXAMPLE
Some solutions for n=3 0=self 1=nw 2=n 3=ne 4=w 6=e 7=sw 8=s 9=se (reciprocal directions total 10)
.68.49.67.46.48...69.47.00.69.47...00.68.49.00.00...00.78.79.67.48
.28.39.17.78.27...36.14.68.34.18...68.24.78.17.00...38.23.37.18.28
.26.34.13.23.00...00.00.26.46.24...26.34.23.00.00...26.34.00.26.24
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 17 2012
STATUS
approved