OFFSET
1,2
COMMENTS
Table starts
...1.....2.......4.........7..........12............21...............37
...2....10......29........87.........280...........876.............2735
...4....29.....147.......774........4080.........21489...........113466
...7....87.....774......7071.......64189........588529..........5400933
..12...280....4080.....64189.....1012315......16031147........253594307
..21...876...21489....588529....16031147.....437241277......11938414614
..37..2735..113466...5400933...253594307...11938414614.....563330031268
..65..8583..598374..49414072..4003959566..325438086413...26515589323171
.114.26900.3155426.452274232.63279327977.8875686431050.1248681784524804
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..241
FORMULA
Empirical for column k:
k=1: a(n) = 2*a(n-1) -a(n-2) +a(n-3)
k=2: a(n) = 2*a(n-1) +2*a(n-2) +5*a(n-3) -a(n-5) -a(n-6)
k=3: [order 18]
k=4: [order 45]
EXAMPLE
Some solutions for n=5 k=4
..0..1..1..1. .1..1..0..1. .0..0..1..1. .1..1..1..0. .0..1..1..0
..0..1..0..1. .1..0..0..1. .0..0..0..1. .0..0..0..1. .0..0..0..0
..1..1..0..0. .0..1..1..0. .1..0..0..1. .1..1..0..1. .1..1..0..0
..0..0..1..1. .1..1..1..0. .1..0..0..0. .1..0..0..1. .0..1..0..1
..0..0..1..1. .1..1..0..0. .0..1..1..0. .1..1..1..0. .0..1..1..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Nov 23 2017
STATUS
approved