OFFSET
1,1
COMMENTS
Row 4 of A264878.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=4
..1..2.12..4.14....1..2..3..4.14....1..2..3..4.14....1..2.12..4.14
.15..0.17..9..3...15..0..8..9.19....6..0.17..9.19...15..0..8..9..3
.20..5..6..7..8...20..5..6..7.24...20..5.22..7..8...20..5..6..7.24
.16.10.11.19.13...16.10.11.12.13...16.10.11.12.13...16.10.11.19.13
.21.22.23.24.18...21.22.23.17.18...21.15.23.24.18...21.22.23.17.18
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 27 2015
STATUS
approved