OFFSET
1,5
COMMENTS
Table starts
.1....1.....1.......1.........1...........1............1..............1
.1....5....12......37.......104.........301..........864...........2485
.1...12....22......81.......307........1201.........5066..........21292
.1...37....81.....427......2338.......13458........84948.........543741
.1..104...307....2338.....21811......204034......2004660.......19807948
.1..301..1201...13458....204034.....3126013.....49405101......783633192
.1..864..5066...84948...2004660....49405101...1240303182....31113970216
.1.2485.21292..543741..19807948...783633192..31113970216..1230133478378
.1.7144.90443.3534493.196822255.12536955677.788871054393.49254153618728
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..180
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1)
k=2: a(n) = 5*a(n-2) +8*a(n-3) +4*a(n-4)
k=3: [order 19] for n>20
k=4: [order 66] for n>68
EXAMPLE
Some solutions for n=5 k=4
..0..0..1..1. .0..0..1..0. .0..0..0..0. .0..0..1..1. .0..0..1..0
..1..0..0..1. .0..0..1..1. .1..0..1..0. .0..1..1..0. .0..1..1..1
..1..1..1..1. .1..0..1..1. .1..1..0..1. .1..0..0..0. .1..1..0..0
..0..0..0..0. .1..1..0..0. .0..0..1..0. .0..1..1..0. .0..0..1..0
..1..0..0..1. .0..1..0..0. .1..0..0..0. .0..0..1..1. .1..0..1..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Feb 23 2018
STATUS
approved