OFFSET
1,5
COMMENTS
Table starts
.1...1...1....1.....1.....1......1.......1........1........1.........1
.1...4...7...13....26....49.....99.....194......387......773......1538
.1...7..13...21....29....58....120.....250......515.....1100......2302
.1..13..21...26....70...139....287.....625.....1484.....3197......7321
.1..26..29...70...189...468...1436....3753....11101....32272.....92418
.1..49..58..139...468..1916...5296...17450....62128...207139....693887
.1..99.120..287..1436..5296..18950...76117...313593..1223755...4910872
.1.194.250..625..3753.17450..76117..401301..2043622..9772099..49480464
.1.387.515.1484.11101.62128.313593.2043622.12197817.69375211.421959328
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..220
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1)
k=2: a(n) = a(n-1) +3*a(n-2) -4*a(n-4) for n>5
k=3: [order 18] for n>19
k=4: [order 70] for n>71
EXAMPLE
Some solutions for n=5 k=4
..0..1..1..0. .0..1..1..0. .0..0..0..1. .0..1..1..0. .0..0..1..0
..1..0..0..1. .1..1..0..1. .0..0..0..1. .1..0..1..1. .1..1..0..1
..0..1..1..0. .1..0..1..0. .1..1..1..1. .1..1..1..0. .1..1..1..0
..1..0..0..1. .0..0..1..0. .1..0..0..0. .0..0..1..1. .1..1..0..1
..0..1..1..0. .1..1..0..1. .1..0..0..0. .1..0..0..0. .0..0..1..0
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, May 22 2018
STATUS
approved