OFFSET
1,1
COMMENTS
Column 6 of A264379.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..136
EXAMPLE
Some solutions for n=3
..7..2..3..4..5.12.11....7..2..3..8..5.12.13....7..2..9..8..5.10.13
..0..1.10.17.18.13..6....0..1.14.11..4.17.18....0..1.16..3..4.17.18
.21..8..9.22.23.24.27...15.22.21.10..6.24.27...15.22.21.24..6.12.27
.14.15.16.25.26.19.20....9.23.16.25.26.19.20...14.23.11.25.26.19.20
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 12 2015
STATUS
approved