OFFSET
1,3
COMMENTS
Row 4 of A264520.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=4
..7..6..0..1..9....7..8..9..1..2....7..6..9..8..2....5..6..9..1..2
.12.11..2..3..4....0.13.14..3..4....0..1.14..3..4....0.11.12..3..4
..5.18.10..8.19....5..6.19.11.12....5.18.10.11.12...17.18..7..8.19
.20.23.24.13.14...10.21.24.23.17...20.23.22.13.24...10.23.24.13.14
.15.16.17.21.22...15.16.20.18.22...15.16.17.21.19...15.16.20.21.22
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 16 2015
STATUS
approved