OFFSET
1,2
COMMENTS
Table starts
...1.....2.......4.........8.........16...........32.............64
...2.....8......30.......112........420.........1576...........5912
...4....30.....142.......698.......3398........16686..........81809
...8...112.....698......5157......37221.......273221........2000595
..16...420....3398.....37221.....392393......4237829.......45938893
..32..1576...16686....273221....4237829.....67247490.....1080066752
..64..5912...81809...2000595...45938893...1080066752....25956605294
.128.22176..401415..14657917..497129492..17278502991...620005212254
.256.83184.1969107.107409094.5387633738.277268412729.14887658798448
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 10] for n>12
k=4: [order 35] for n>37
EXAMPLE
Some solutions for n=5 k=4
..0..0..0..1. .0..0..1..0. .0..1..1..0. .0..1..1..1. .0..1..0..1
..0..0..0..0. .0..1..1..1. .0..1..1..0. .0..1..1..1. .0..0..1..1
..0..1..1..1. .1..1..0..1. .1..1..1..1. .0..1..0..1. .0..0..1..1
..1..1..1..0. .0..1..1..1. .1..1..0..1. .1..1..1..1. .1..0..0..1
..1..1..0..1. .1..0..1..0. .0..1..1..0. .1..0..0..0. .0..1..0..0
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jul 21 2018
STATUS
approved