OFFSET
1,2
COMMENTS
Column 6 of A220738
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=3 0=self 1=nw 3=ne 4=w 6=e 7=sw 9=se (reciprocal directions total 10)
.00.00.79.00.69.47...00.67.47.79.00.00...00.00.00.00.69.47...00.79.67.49.69.47
.00.36.47.17.39.17...39.39.39.69.14.00...00.00.00.69.34.17...36.34.17.79.13.17
.00.36.34.00.36.14...00.16.14.16.14.00...00.00.00.00.13.00...00.36.34.00.13.00
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 18 2012
STATUS
approved