OFFSET
1,2
COMMENTS
Column 7 of A264655.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..191
EXAMPLE
Some solutions for n=4
..8..2..3..4.12.13..7.15....1..9.10.11..5..6..7.15....1..2.10..4.12..6..7.15
..9.17..1.19.20.14..5..6...16..0.18.12.13..4.22.23...16..0.18.19..3.14..5.23
.24.25..0.10.11.22.23.31...24.25.19.27..2..3.30.14...24..8..9.20.11.29.13.31
.32.16.27.18.36.30.38.39...32.26..8.28.36.20.31.39...32.26.27.35.36.30.38.22
.33.34.35.26.37.28.29.21...33.34.35.17.37.38.29.21...33.34.25.17.37.28.39.21
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 20 2015
STATUS
approved