OFFSET
1,2
COMMENTS
Table starts
...1.....2......4........8.........16..........32............64.............128
...2.....8.....23.......65........192.........569..........1709............5162
...4....23.....96......400.......1704........7313.........31328..........134118
...8....65....400.....2567......16048......101054........639838.........4056201
..16...192...1704....16048.....147281.....1372782......12838095.......120108770
..32...569...7313...101054....1372782....19006132.....263269309......3646120276
..64..1709..31328...639838...12838095...263269309....5395769696....110527120611
.128..5162.134118..4056201..120108770..3646120276..110527120611...3348077796513
.256.15663.574442.25720439.1124195594.50524538223.2265876477133.101540680029955
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) -6*a(n-3) -8*a(n-4) for n>5
k=3: [order 16] for n>17
k=4: [order 57] for n>59
EXAMPLE
Some solutions for n=5 k=4
..0..0..0..0. .0..1..1..0. .0..1..1..0. .0..1..1..1. .0..0..0..0
..0..1..0..0. .1..1..0..0. .1..1..0..1. .0..0..1..1. .0..0..0..0
..0..0..0..0. .1..1..0..1. .0..1..1..0. .1..1..1..1. .1..1..0..0
..0..0..1..0. .0..0..0..0. .0..0..0..0. .1..0..1..1. .1..0..0..0
..1..0..0..0. .1..0..0..1. .1..0..0..0. .1..0..0..1. .1..1..0..0
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jul 18 2018
STATUS
approved