OFFSET
1,1
COMMENTS
Column 7 of A264336.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=4
..1..8..3..4.11..6.13.14....1..8..3.10..5.12.13.14....1..8..3..4.11..6.13.14
..0..2.17.18.19..5.15..7....0.16..2..4.19..6.21..7....0.16..2.18.19..5.21..7
..9.10.25.20.12.22.29.30....9.18.11.26.27.28.29.15....9.10.25.20.12.22.15.30
.16.32.33.34.35.21.37.23...17.32.33.34.20.22.23.38...17.32.33.34.35.36.37.23
.24.26.27.36.28.38.39.31...24.25.35.36.37.30.39.31...24.26.27.28.29.38.39.31
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 11 2015
STATUS
approved