OFFSET
1,5
COMMENTS
Table starts
.1....1.....1.......1........1..........1............1.............1
.1....5....12......37......104........301..........864..........2485
.1...12....10......50......148........493.........2093..........8047
.1...37....50.....269.....1297.......6063........35908........203345
.1..104...148....1297....10969......86979.......795788.......7018070
.1..301...493....6063....86979....1091801.....16092678.....225171354
.1..864..2093...35908...795788...16092678....364785216....7961618817
.1.2485..8047..203345..7018070..225171354...7961618817..269830709761
.1.7144.31951.1189795.62968846.3223061387.177727031452.9389112358693
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 16] for n>18
k=4: [order 58] for n>61
EXAMPLE
Some solutions for n=5, k=4
..0..1..1..0. .0..1..0..1. .0..1..1..0. .0..0..0..0. .0..1..1..0
..1..1..1..1. .0..0..0..0. .1..1..1..1. .1..0..0..1. .1..1..1..1
..1..1..1..1. .1..1..1..1. .1..1..1..1. .0..0..0..0. .0..0..0..0
..0..1..1..0. .0..1..1..0. .0..1..1..0. .1..1..1..1. .1..0..0..1
..0..0..0..0. .1..1..1..1. .1..1..1..1. .1..0..1..1. .0..0..0..0
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jan 20 2018
STATUS
approved