OFFSET
1,1
COMMENTS
Table starts
...2....4......7......13........23.........41...........72...........126
...4...11.....26......65.......148........343..........766..........1709
...7...26.....91.....316......1031.......3354........10615.........33344
..13...65....316....1462......6383......27531.......115391........478849
..23..148...1031....6383.....38483.....224960......1288693.......7271509
..41..343...3354...27531....224960....1755113.....13493468.....101738555
..72..766..10615..115391...1288693...13493468....140404442....1425678976
.126.1709..33344..478849...7271509..101738555...1425678976...19400886875
.219.3752.103339.1957904..40511381..758303322..14341399141..262072220011
.379.8195.317958.7940136.223527424.5590121407.142487073304.3491534799847
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..1404
FORMULA
Empirical for column k:
k=1: a(n) = 2*a(n-1) +a(n-2) -2*a(n-3) -a(n-4).
k=2: a(n) = 2*a(n-1) +3*a(n-2) -4*a(n-3) -4*a(n-4).
k=3: a(n) = 4*a(n-1) +2*a(n-2) -16*a(n-3) -a(n-4) +12*a(n-5) -4*a(n-6).
k=4: [order 8].
k=5: [order 12].
k=6: [order 16].
k=7: [order 28].
EXAMPLE
Some solutions for n=4, k=4
..0..0..0..0. .1..0..0..1. .1..0..1..1. .0..1..0..1. .0..1..0..0
..1..0..1..1. .0..0..1..0. .0..0..0..0. .1..0..0..0. .0..0..1..0
..0..0..0..0. .0..0..0..0. .0..0..0..0. .0..0..0..0. .0..0..0..0
..0..0..0..0. .0..1..0..0. .1..0..1..0. .1..0..1..0. .0..1..0..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Feb 13 2016
STATUS
approved