OFFSET
1,1
COMMENTS
Column 6 of A264059.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..107
EXAMPLE
Some solutions for n=2
..9.10..2.15..4..5..6....0..1.14.15.16..5..6....0.10.14..3.16..5.18
.16.17..0..1.11.12.13....7.17..9.19.20.12.13....7.17..9..1.11.12.13
.14..3..7..8.18.19.20....2..3..4..8.18.10.11....2.15..4..8..6.19.20
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 02 2015
STATUS
approved