OFFSET
1,1
COMMENTS
Column 7 of A264257.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..61
EXAMPLE
Some solutions for n=2
..1..2..3..4..5..6..7.15....8..2..1.11..5.13.14.15....8..0..3..1..2.13..7..6
..0.17.18..9.10.11.12.14....0.10.18..3..4.12..6..7....9.10.11.12..4..5.15.14
..8.16.19.20.21.13.23.22...17..9.16.20.21.19.23.22...17.18.16.20.21.19.23.22
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 09 2015
STATUS
approved