OFFSET
1,2
COMMENTS
Diagonal of A264336.
EXAMPLE
Some solutions for n=4
..1..5..3..7..8....1..5..3..7..8....1..5..3..4..8....1..2..6..4..8
..0..2.11.12..4....0..2.11.12..4....0..7..2.12.13....0.10..3..9.13
..6.15.13.14..9....6.15.16..9.18...11..6.16..9.18....5.15..7.17.18
.10.20.21.22.23...10.20.13.14.23...10.20.21.14.23...11.20.12.22.14
.16.17.18.24.19...21.22.17.24.19...15.22.17.24.19...21.16.23.24.19
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 11 2015
STATUS
approved