OFFSET
1,2
COMMENTS
Column 6 of A220595
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..31
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)
.00.89.89.00.00.78...00.89.79.69.46.48...00.68.47.69.46.47...00.69.46.48.00.00
.00.29.12.17.37.27...00.23.18.19.16.24...00.23.69.47.13.00...00.89.17.26.47.78
.00.00.13.36.34.00...00.00.26.46.14.00...00.00.36.14.00.00...00.23.16.34.36.24
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 16 2012
STATUS
approved