OFFSET
1,2
COMMENTS
Table starts
...1.....2.......4.........8..........16............32..............64
...2.....8......30.......112.........420..........1576............5912
...4....30.....169.......983........5701.........33046..........191692
...8...112.....983......9233.......87009........811854.........7609680
..16...420....5701.....87009.....1363249......20825877.......321003969
..32..1576...33046....811854....20825877.....513913591.....12835573991
..64..5912..191692...7609680...321003969...12835573991....521608116975
.128.22176.1111756..71307863..4949107992..320914969638..21245308955509
.256.83184.6447926.667818686.76181954073.8003158157235.862069068522225
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..1..1..0. .0..0..0..1. .0..0..0..1. .0..1..1..0. .0..0..1..0
..1..0..1..0. .0..1..0..0. .0..0..0..0. .1..0..1..0. .0..1..1..1
..1..1..1..1. .0..1..0..0. .0..0..0..0. .1..1..1..1. .0..1..1..0
..1..0..0..1. .1..0..0..0. .1..0..0..0. .1..1..1..1. .1..0..1..0
..1..0..1..1. .0..1..0..1. .0..1..0..0. .0..0..1..1. .0..0..0..0
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jul 14 2018
STATUS
approved