OFFSET
1,1
COMMENTS
Column 4 of A264163.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..177
EXAMPLE
Some solutions for n=3
..1..2..7..8..9....5..2..7..4..9....1..2..0..4..9....1..2..0..4..3
..6..5.12..3..4....0..1..6..3..8....6..7..5..3..8...10..5.12..9..8
..0.10.13.14.19...15.16.13.14.19...15.10.17.12.19...11..6.17.14.13
.16.11.15.17.18...10.11.12.17.18...16.11.18.13.14...16.15..7.19.18
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 06 2015
STATUS
approved