OFFSET
1,2
COMMENTS
Table starts
...1.....2.......4.........8..........16............32..............64
...2.....8......30.......112.........420..........1576............5912
...4....30.....162.......894........4905.........26952..........148138
...8...112.....894......7665.......65047........551591.........4691054
..16...420....4905.....65047......854383......11158663.......146589898
..32..1576...26952....551591....11158663.....223714229......4522081307
..64..5912..148138...4691054...146589898....4522081307....140997597309
.128.22176..814090..39872525..1924812465...91395911298...4396796733747
.256.83184.4474116.338839996.25259268302.1845641069555.136949793274310
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) -2*a(n-2) +4*a(n-3)
k=3: [order 11] for n>12
k=4: [order 38] for n>39
EXAMPLE
Some solutions for n=5 k=4
..0..0..1..1. .0..1..1..0. .0..1..1..0. .0..1..0..1. .0..1..0..1
..0..0..0..0. .0..1..1..0. .1..0..0..0. .0..1..0..1. .1..0..1..1
..0..1..0..0. .1..1..1..0. .0..0..0..0. .1..1..1..0. .0..1..0..1
..0..1..1..0. .1..1..1..1. .1..0..0..0. .1..1..1..0. .1..1..1..0
..1..1..1..1. .0..0..1..1. .1..1..1..0. .1..0..0..1. .0..0..1..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jul 18 2018
STATUS
approved