OFFSET
1,2
COMMENTS
Column 4 of A264422.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=4
.11..0..8..2..3....6..7..8..2..3....6..7..8..9..3...11..0..1..2..3
.16..1.10..7..4....0.12.13.14..4....0..1..2.11..4...16.12.13.14..4
..5..6.23.24..9....5.17.23..1..9...16.17.23.12.13...21..6.23..8..9
.21.22.12.13.14...21.11.20.24.18...21.22..5.24.14...10.22..5.24..7
.15.20.17.18.19...15.16.10.22.19...15.20.10.18.19...15.20.17.18.19
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 12 2015
STATUS
approved