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.....21730......202841......1992466.......19685956
.1..301..1201...13458....202841.....3096833.....48911434......775504649
.1..864..5066...84948...1992466....48911434...1226106440....30729398000
.1.2485.21292..543741..19685956...775504649..30729398000..1213390065190
.1.7144.90443.3534493.195564094.12397088059.778116037031.48505143319432
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..1..0..1. .0..0..1..0. .0..0..1..1. .0..0..0..0. .0..0..1..0
..1..1..0..0. .1..0..0..0. .0..1..1..0. .0..1..0..1. .0..0..1..1
..1..0..0..1. .0..0..0..1. .0..1..0..0. .1..1..1..1. .1..0..1..0
..0..0..1..1. .0..0..0..0. .0..0..1..1. .0..0..0..0. .0..0..1..1
..1..0..1..1. .0..1..0..0. .0..1..1..0. .1..0..0..1. .1..0..1..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Feb 05 2018
STATUS
approved