OFFSET
1,12
COMMENTS
Table starts
.1...1..1...1....1.....1......1........1.........1..........1............1
.1...1..1...2....5.....9.....22.......45.......101........218..........477
.1...1..6...2....4.....7......8.......15........23.........38...........61
.1...2..2...4...11....26.....76......222.......721.......2361.........7737
.1...5..4..11...37...178....139......823......3906......12610........55215
.1...9..7..26..178...562...2607....15018.....81636.....455586......2645277
.1..22..8..76..139..2607...9889....75446....868689....7675611.....76328995
.1..45.15.222..823.15018..75446..1477645..18375492..261985685...3562741942
.1.101.23.721.3906.81636.868689.18375492.403292040.8471002968.176635665084
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..219
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1)
k=2: a(n) = a(n-1) +3*a(n-2) -2*a(n-4) for n>5
k=3: a(n) = a(n-1) +a(n-2) for n>7
k=4: [order 21] for n>27
EXAMPLE
Some solutions for n=5 k=4
..0..0..1..1. .0..0..1..1. .0..0..1..1. .0..0..1..1. .0..0..0..0
..0..0..1..1. .0..0..1..1. .0..0..1..1. .0..0..1..1. .0..0..0..0
..0..1..1..0. .0..0..1..1. .1..0..0..1. .1..0..1..1. .0..0..0..0
..0..0..1..1. .1..1..0..0. .0..0..1..1. .0..0..1..1. .1..1..1..1
..0..0..1..1. .1..1..0..0. .0..0..1..1. .0..0..1..1. .1..1..1..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jan 26 2018
STATUS
approved