OFFSET
1,4
COMMENTS
Table starts
..0...0.....2......2........5..........8..........15............26
..0...4....10.....20.......38.........68.........120...........208
..2..10....29.....86......240........626........1603..........4030
..2..20....86....400.....1592.......5888.......21882.........79112
..5..38...240...1592.....9042......51568......283450.......1526492
..8..68...626...5888....51568.....429716.....3490152......27850092
.15.120..1603..21882...283450....3490152....42093113.....498160278
.26.208..4030..79112..1526492...27850092...498160278....8746623144
.46.358..9973.281754..8110769..218952412..5812405127..151499712450
.80.612.24388.991292.42557410.1701805320.67071788240.2595668095672
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..180
FORMULA
Empirical for column k:
k=1: a(n) = 2*a(n-1) +a(n-2) -2*a(n-3) -a(n-4) for n>5
k=2: a(n) = 3*a(n-1) -a(n-2) -3*a(n-3) +a(n-4) +a(n-5)
k=3: a(n) = 4*a(n-1) -4*a(n-2) +2*a(n-3) -4*a(n-4) -a(n-6) for n>9
k=4: [order 28] for n>31
k=5: [order 58] for n>69
EXAMPLE
Some solutions for n=4 k=4
..0..1..1..0. .0..0..1..1. .0..1..1..1. .0..1..0..0. .0..1..0..1
..1..0..0..1. .1..1..0..1. .1..0..1..0. .1..1..1..1. .0..0..1..0
..0..1..0..1. .0..0..1..0. .0..0..1..1. .0..1..0..0. .1..0..1..0
..0..1..1..0. .1..0..1..0. .1..1..0..0. .0..1..0..1. .0..1..0..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Dec 08 2016
STATUS
approved