OFFSET
1,5
COMMENTS
Table starts
.0....1....0......1........0.........1...........0.............1
.1....4....4.....16.......48........88.........240...........704
.0....4....0.....11.......26........46.........204...........696
.1...16...11....161......478......2459.......15248.........78163
.0...48...26....478.....5938.....22133......206239.......2539477
.1...88...46...2459....22133....255029.....4095727......62979342
.0..240..204..15248...206239...4095727...112275165....2871621220
.1..704..696..78163..2539477..62979342..2871621220..141892377970
.0.1600.1493.390424.16116493.804773211.62756244756.4903035588074
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..180
FORMULA
Empirical for column k:
k=1: a(n) = a(n-2)
k=2: a(n) = 2*a(n-1) +8*a(n-3) -8*a(n-4) -8*a(n-5)
k=3: [order 17] for n>18
k=4: [order 53] for n>56
EXAMPLE
Some solutions for n=5 k=4
..0..1..1..1. .0..0..1..1. .0..0..0..0. .0..1..1..0. .0..0..1..1
..1..0..1..1. .1..1..1..1. .1..1..0..0. .0..1..1..0. .0..0..1..1
..0..0..0..1. .1..1..0..0. .1..1..1..1. .0..0..1..1. .1..1..1..1
..0..0..1..1. .1..1..0..0. .0..1..0..0. .0..0..0..1. .0..0..1..1
..1..1..1..1. .1..1..0..0. .0..1..0..0. .0..0..1..0. .0..0..0..0
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jan 19 2018
STATUS
approved