OFFSET
1,2
COMMENTS
Column 7 of A189435
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..189
EXAMPLE
Some solutions for 3X7
..0..1..2..3..4.12..6....0..1..9.10.11..5..6....7..8..9.10..4..5.13
.14.15.16.17..5.19.13....7..8..3..2.18..4.13....1..0..3..2.11..6.20
..8..7.10..9.18.11.20...14.15.16.17.12.19.20...14.15.16.17.18.19.12
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 22 2011
STATUS
approved