OFFSET
1,2
COMMENTS
Row 4 of A264583.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=4
..1..2..3..4..8....1..5..3..4..8....1..2..3..7..8....1..2..3..7..8
..6.10..0.12.13....0..7..2.12.13....0.10.11..9..4....6.10..0..9..4
..5.15..7.17..9...11.15.16..6..9....5..6.13.14.18...11.12..5.17.18
.16.20.18.11.14...10.20.18.19.14...16.20.12.19.23...16.20.21.13.14
.21.22.23.24.19...21.22.23.24.17...21.22.15.24.17...15.22.23.24.19
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 18 2015
STATUS
approved