OFFSET
1,2
COMMENTS
Table starts
...1......2.......4.........8..........16............32..............64
...2......8......31.......121.........472..........1841............7181
...4.....31.....179......1080........6585.........40023..........243312
...8....121....1080.....10363......100823........974646.........9424684
..16....472....6585....100823.....1585983......24665530.......383819990
..32...1841...40023....974646....24665530.....615314145.....15351583824
..64...7181..243312...9424684...383819990...15351583824....613943466291
.128..28010.1479656..91234133..5986258088..384274120067..24660009931840
.256.109255.8997567.882982660.93328306577.9615094296606.990036737595402
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) = 3*a(n-1) +3*a(n-2) +2*a(n-3)
k=3: [order 11] for n>12
k=4: [order 38] for n>39
EXAMPLE
Some solutions for n=5 k=4
..0..0..1..0. .0..1..1..1. .0..0..0..1. .0..0..0..1. .0..0..1..0
..1..0..1..0. .1..1..1..0. .1..0..0..1. .1..0..0..0. .1..0..0..0
..1..1..1..1. .0..0..0..0. .0..0..0..0. .1..0..0..0. .0..0..0..0
..0..1..1..1. .1..0..0..0. .1..0..0..0. .0..1..1..0. .1..1..1..0
..0..1..1..0. .0..0..1..0. .1..0..0..1. .0..1..1..1. .0..0..1..0
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Feb 15 2018
STATUS
approved