OFFSET
1,2
COMMENTS
Column 5 of A220718
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..129
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)
.00.68.49.79.00...00.00.00.68.48...89.00.68.49.00...00.69.48.00.78
.00.29.38.16.14...68.48.69.24.27...29.18.29.69.14...68.47.12.38.27
.00.00.12.00.00...26.24.00.13.00...00.12.00.16.14...23.00.00.23.00
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 18 2012
STATUS
approved