OFFSET
1,5
COMMENTS
Table starts
.1....1.....1.......1.........1..........1............1..............1
.1....3.....5......16........40........113..........304............833
.1....5....12......36.......122........429.........1585...........5755
.1...16....36.....300......1436.......8974........52012.........311037
.1...40...122....1436.....12951.....124543......1220365.......11917710
.1..113...429....8974....124543....1972991.....31434011......501719570
.1..304..1585...52012...1220365...31434011....831752031....21825406629
.1..833..5755..311037..11917710..501719570..21825406629...946782030618
.1.2270.21084.1845926.117661891.8058860856.577067248097.41212879288810
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..199
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1)
k=2: a(n) = a(n-1) +4*a(n-2) +2*a(n-3) -a(n-6)
k=3: [order 22] for n>24
k=4: [order 75] for n>78
EXAMPLE
Some solutions for n=5 k=4
..0..1..0..0. .0..1..0..0. .0..0..0..0. .0..1..1..0. .0..1..1..0
..1..1..0..0. .1..1..0..1. .0..1..1..0. .1..1..1..1. .1..0..1..1
..1..1..1..1. .0..1..1..1. .0..1..0..0. .0..0..1..1. .1..1..1..1
..0..1..0..1. .1..1..0..1. .0..0..1..0. .0..0..1..0. .0..0..0..1
..1..1..1..0. .0..1..1..1. .0..0..0..1. .0..0..0..0. .0..0..1..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Mar 08 2018
STATUS
approved