OFFSET
1,8
COMMENTS
Table starts
.0...0..0....0....0.....0......0.......0........0.........0.........0
.0...1..3....2...11....13.....34......65......123.......266.......499
.0...3..1....4....3.....7.....14......35.......89.......242.......643
.0...2..4...11...23....72....201.....597.....1705......5141.....15305
.0..11..3...23...86...238....604....2492.....7722.....26880.....93816
.0..13..7...72..238...895...3335...13980....55889....230402....953813
.0..34.14..201..604..3335..13991...70095...331341...1644480...8037526
.0..65.35..597.2492.13980..70095..435534..2412035..14299708..83146969
.0.123.89.1705.7722.55889.331341.2412035.16014301.112395697.777907073
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..220
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1)
k=2: a(n) = a(n-1) +3*a(n-2) -4*a(n-4)
k=3: [order 18] for n>19
k=4: [order 53] for n>54
EXAMPLE
Some solutions for n=7 k=4
..0..0..1..1. .0..0..1..1. .0..0..0..0. .0..0..1..1. .0..0..1..1
..0..1..0..1. .0..1..0..1. .0..1..1..0. .0..1..0..1. .0..1..0..1
..1..0..1..0. .0..1..1..0. .1..0..1..0. .0..1..1..0. .0..1..1..0
..1..1..0..0. .0..0..0..0. .1..0..0..0. .0..1..0..1. .0..1..0..1
..1..0..1..0. .1..1..1..1. .0..1..1..0. .0..0..0..1. .0..1..0..1
..0..1..1..0. .1..1..1..1. .1..0..0..1. .0..1..1..0. .1..0..0..1
..0..0..0..0. .1..1..1..1. .1..1..1..1. .1..1..0..0. .1..1..1..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jan 15 2018
STATUS
approved