OFFSET
1,2
COMMENTS
Table starts
...1.....2......4........8........16..........32...........64............128
...2.....8.....26.......88.......298........1012.........3440..........11700
...4....26.....94......372......1510........6105........24546..........98995
...8....88....372.....1977.....11553.......63472.......350339........1960512
..16...298...1510....11553....111695......881525......7133441.......61902351
..32..1012...6105....63472....881525.....9369586....103514554.....1240234582
..64..3440..24546...350339...7133441...103514554...1591404390....26808046076
.128.11700..98995..1960512..61902351..1240234582..26808046076...667156890263
.256.39804.399424.10931666.518059406.14225843633.428444704211.15251414560006
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..180
FORMULA
Empirical for column k:
k=1: a(n) = 2*a(n-1)
k=2: a(n) = 4*a(n-1) -2*a(n-2) +2*a(n-3) -6*a(n-4) -4*a(n-5)
k=3: [order 18] for n>19
k=4: [order 65] for n>66
EXAMPLE
Some solutions for n=5 k=4
..0..1..1..0. .0..0..1..0. .0..0..1..1. .0..1..1..1. .0..0..1..0
..0..0..1..0. .1..0..1..0. .0..1..0..1. .1..0..0..0. .1..0..0..1
..1..1..1..1. .0..1..1..0. .0..1..0..1. .1..1..1..1. .0..0..0..1
..0..0..0..0. .1..1..0..0. .1..0..1..1. .0..0..0..1. .1..0..0..1
..1..1..1..1. .1..0..1..1. .0..1..1..0. .0..0..0..1. .1..0..0..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jan 31 2018
STATUS
approved