OFFSET
1,2
COMMENTS
Column 5 of A264878.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=4
.12..2..3..4..5.17....1..0..3..2..5.17...12..2..3.15..5.17....1.13..3.15..5.17
..7..0..1.10.11.23...18..6..7..8.11..4....7..0..1..8.11..4...18..0..9..2.11..4
.24..6.26..8..9.29...13.12.15.16..9.10...24..6.13.14..9.10...24..6..7..8.28.10
.19.20.13.14.15.16...19.20.21.14.23.22...19.18.21.22.23.16...19.12.21.14.23.16
.25.18.27.28.21.22...25.24.27.26.29.28...25.26.27.20.29.28...25.26.27.20.29.22
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 27 2015
STATUS
approved