OFFSET
1,5
COMMENTS
Table starts
.1....1......1........1..........1............1..............1
.1....3......5.......16.........40..........113............304
.1....5.....24.......92........391.........1728...........7640
.1...16.....92......742.......5472........43211.........339956
.1...40....391.....5472......74479......1050609.......14890200
.1..113...1728....43211....1050609.....26709523......681538595
.1..304...7640...339956...14890200....681538595....31363814530
.1..833..33824..2691202..212169356..17470755574..1449439465725
.1.2270.150119.21316797.3027488635.448475800823.67069319310675
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..241
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1)
k=2: a(n) = a(n-1) +4*a(n-2) +2*a(n-3) -a(n-6)
k=3: [order 20] for n>21
k=4: [order 60] for n>62
EXAMPLE
Some solutions for n=5 k=4
..0..0..0..0. .0..1..1..0. .0..1..1..1. .0..0..0..1. .0..0..1..0
..0..1..1..0. .1..1..1..1. .1..1..1..0. .0..0..1..1. .0..0..0..0
..1..1..1..0. .0..0..0..1. .1..0..0..0. .0..0..1..1. .1..1..1..1
..0..0..0..1. .0..1..0..1. .0..0..1..1. .1..1..1..1. .1..1..1..1
..0..0..1..1. .0..0..1..1. .0..1..1..0. .1..1..1..1. .0..1..1..0
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Mar 23 2018
STATUS
approved