OFFSET
1,2
COMMENTS
Diagonal of A264059.
EXAMPLE
Some solutions for n=4
..0..1..2.11.12....0..8..9..3..4....0..8.10..3.12....0..1..2.11..4
..5..6.14..8..9....5..6.15..1..2....5..6.14..1..2....5..6.15.16..9
.17..3..4.13.22...17.11.19.13.14...17.11..4.13..7...10..3.19.21..7
..7.23.10.18.19....7.23.10.18.12...22.16..9.18.19...22..8.24.18.12
.20.21.15.16.24...20.21.22.16.24...20.21.15.23.24...20.13.14.23.17
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 02 2015
STATUS
approved