OFFSET
1,2
COMMENTS
Table starts
...1....2....4.....8......16.......32........64........128.........256
...2....7...13....29......73......157.......353........869........1993
...4...13...20....41.....102......253.......632.......1563........3896
...8...29...41...125.....585.....1974......6542......24545.......89192
..16...73..102...585....3068....11263.....53159.....246537.....1098723
..32..157..253..1974...11263....54005....324797....1859944....10716128
..64..353..632..6542...53159...324797...2714797...21236116...164681059
.128..869.1563.24545..246537..1859944..21236116..213883244..2166043717
.256.1993.3896.89192.1098723.10716128.164681059.2166043717.29310012663
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..180
FORMULA
Empirical for column k:
k=1: a(n) = 2*a(n-1)
k=2: a(n) = 4*a(n-1) -5*a(n-2) +10*a(n-3) -24*a(n-4) +16*a(n-5) for n>6
k=3: [order 16] for n>17
k=4: [order 67] for n>68
EXAMPLE
Some solutions for n=5 k=4
..0..1..1..0. .0..0..1..1. .0..1..1..0. .0..1..0..1. .0..1..0..0
..0..0..1..0. .1..1..0..0. .0..0..1..0. .1..0..1..0. .0..1..0..1
..1..1..1..0. .0..0..0..1. .1..1..1..1. .0..0..1..1. .1..1..1..1
..0..1..0..1. .1..0..1..0. .0..0..1..1. .0..0..1..1. .1..1..0..0
..1..1..0..1. .0..0..1..0. .1..0..1..0. .0..1..0..1. .0..1..0..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Feb 21 2018
STATUS
approved