OFFSET
1,2
COMMENTS
Every 0 is next to 0 4's, every 1 is next to 1 1's, every 2 is next to 2 2's, every 3 is next to 3 0's, every 4 is next to 4 3's
Table starts
..1.....2........3..........4.............6................9.................13
..2.....6.......15.........48...........145..............449...............1397
..3....15......101........562..........3145............17966.............102080
..4....48......562.......5465.........58639...........634241............6764386
..6...145.....3145......58639.......1210968.........24281566..........482839574
..9...449....17966.....634241......24281566........906566345........33928210026
.13..1397...102080....6764386.....482839574......33928210026......2383058555507
.19..4342...579654...72281541....9688062164....1276381991598....167702841476961
.28.13500..3294963..773637307..194158517334...47878302949552..11786999591610885
.41.41981.18723516.8274218119.3887864391419.1796412252140585.828960396306273892
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..144
EXAMPLE
Some solutions for n=6 k=4
..0..0..0..0....0..0..0..0....0..0..0..1....0..0..0..0....0..0..0..0
..1..0..3..0....3..0..0..3....0..0..0..1....0..1..1..0....0..0..1..1
..1..0..1..0....0..1..1..0....0..3..0..0....1..0..0..3....1..1..0..0
..0..3..1..0....0..0..3..0....0..1..1..0....1..0..0..0....2..2..0..0
..1..0..3..0....0..0..0..0....0..0..2..2....0..0..0..1....2..2..0..0
..1..0..0..0....0..0..1..1....0..0..2..2....0..0..0..1....0..0..1..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Oct 08 2011
STATUS
approved