OFFSET
1,5
COMMENTS
Table starts
.0....1...0.....1.......0........1.........0...........1.............0
.1....4...4....16......48.......88.......240.........704..........1600
.0....4...1.....6......10.......15........60.........128...........267
.1...16...6....68.....141......489......2774........9849.........39101
.0...48..10...141....1590.....3282.....27915......246700.......1055145
.1...88..15...489....3282....16551....226883.....1917869......16022685
.0..240..60..2774...27915...226883...5097700....70784399.....995832826
.1..704.128..9849..246700..1917869..70784399..2031564141...35098724239
.0.1600.267.39101.1055145.16022685.995832826.35098724239.1185589525594
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 19] for n>20
k=4: [order 63] for n>65
EXAMPLE
Some solutions for n=5 k=4
..0..0..0..1. .0..0..0..0. .0..0..1..1. .0..1..0..1. .0..0..1..0
..0..0..0..1. .1..1..0..0. .0..0..0..0. .0..1..0..1. .0..0..0..1
..1..1..1..1. .1..1..1..1. .1..1..1..1. .0..0..0..0. .1..1..1..1
..0..0..1..0. .0..1..0..0. .1..1..1..1. .1..0..1..0. .0..0..1..1
..0..0..1..0. .0..1..0..0. .1..1..1..1. .1..0..1..0. .0..0..0..0
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jan 27 2018
STATUS
approved