OFFSET
1,4
COMMENTS
Every 0 is next to 0 3's, every 1 is next to 1 2's, every 2 is next to 2 1's, every 3 is next to 3 4's, every 4 is next to 4 0's
Table starts
..1.....1.......2.........3............4..............6.................9
..1.....5......14........37..........104............290...............803
..2....14......66.......306.........1489...........7106.............34021
..3....37.....306......2573........21826.........183864...........1566649
..4...104....1489.....21826.......331406........5021137..........76504483
..6...290....7106....183864......5021137......135820428........3683084153
..9...803...34021...1566649.....76504483.....3683084153......178698032203
.13..2233..162800..13348347...1160102790....99818807528.....8671417152697
.19..6207..779173.113287557..17605551567..2707589789345...420572258618870
.28.17242.3731019.961919858.267441999728.73439922027377.20392149427584727
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..180
EXAMPLE
Some solutions for n=6 k=4
..0..0..0..0....0..0..0..1....0..2..1..0....0..1..2..0....0..0..2..1
..0..0..1..2....0..0..0..2....0..1..0..0....0..0..1..0....0..1..1..0
..0..4..0..1....0..4..0..1....1..0..4..0....0..4..0..0....0..2..0..0
..0..0..2..1....0..0..0..0....2..0..0..0....0..0..1..0....1..1..0..0
..1..0..1..0....0..1..2..0....1..0..1..0....1..0..2..1....2..0..0..1
..2..1..0..0....0..0..1..0....0..0..2..1....2..1..0..0....1..0..1..2
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Oct 10 2011
STATUS
approved