OFFSET
1,1
COMMENTS
Column 6 of A264550.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=4
..1..7..3..4.10..6.12....1..7..3..4.10.11.12....1..2..8..4.10..6.11
..0..9..2.11.16..5.18....0..9..2.16.17..5..6....0.14.15..3.12..5.19
.15..8.17.22.23.20.13...15..8.22.18.23.20.13....7.16..9.18.23.25.13
.14.28.29.25.26.19.32...14.28.29.25.26.19.32...22.28.29.17.26.32.20
.21.30.31.24.33.34.27...21.30.31.24.33.34.27...21.30.31.24.33.34.27
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 17 2015
STATUS
approved