OFFSET
1,2
COMMENTS
Table starts
...1......2.......4.........8..........16............32..............64
...2......8......31.......121.........472..........1841............7181
...4.....31.....163.......927........5331.........30535..........175286
...8....121.....927......8245.......74329........664377.........5966905
..16....472....5331.....74329.....1056001......14831535.......209649848
..32...1841...30535....664377....14831535.....325878154......7216925214
..64...7181..175286...5966905...209649848....7216925214....250915415042
.128..28010.1006611..53667656..2971226455..160460196001...8769920586285
.256.109255.5780036.482603686.42097006186.3565906147902.306309096924610
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) = 3*a(n-1) +3*a(n-2) +2*a(n-3)
k=3: [order 10] for n>11
k=4: [order 30] for n>31
EXAMPLE
Some solutions for n=5 k=4
..0..1..1..0. .0..1..1..0. .0..0..1..1. .0..0..0..1. .0..0..0..0
..0..0..0..1. .1..0..1..1. .1..0..0..1. .1..1..1..1. .1..1..1..0
..1..1..0..1. .1..0..0..0. .1..1..0..1. .0..0..0..0. .0..0..0..1
..1..0..0..1. .0..1..1..1. .0..1..0..1. .0..1..1..1. .0..1..0..0
..1..0..1..1. .1..0..1..1. .0..0..1..0. .0..0..0..1. .0..1..0..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Feb 20 2018
STATUS
approved