OFFSET
1,5
COMMENTS
Table starts
.1....1.....1.......1.........1...........1............1..............1
.1....3.....5......16........40.........113..........304............833
.1....5....16......44.......159.........580.........2145...........8034
.1...16....44.....327......1653.......10135........60730.........366981
.1...40...159....1653.....15861......154497......1550025.......15500146
.1..113...580...10135....154497.....2472677.....40689759......667804248
.1..304..2145...60730...1550025....40689759...1111779576....30150922994
.1..833..8034..366981..15500146...667804248..30150922994..1357319826867
.1.2270.30017.2221003.156403068.11028400250.822562611004.61232880680325
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..0..1..0. .0..0..1..1. .0..0..1..0. .0..0..0..1. .0..0..0..0
..0..1..1..1. .0..1..1..1. .0..0..0..0. .0..1..0..0. .0..0..0..1
..0..1..0..1. .0..0..0..1. .1..1..1..0. .0..0..0..1. .1..1..0..0
..0..1..1..0. .0..0..1..1. .1..0..1..0. .1..1..0..0. .1..0..0..1
..0..0..0..0. .0..1..1..1. .1..1..0..0. .1..1..0..1. .1..1..1..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Mar 17 2018
STATUS
approved