OFFSET
1,2
COMMENTS
Table starts
...1....2...4....8....16.....32......64......128.......256........512
...2....7..13...29....69....137.....301......705......1461.......3193
...4...13..20...27....47.....83.....137......235.......412........709
...8...29..27...75...191....401.....952.....2258......5275......13250
..16...69..47..191...644...1604....4924....16163.....46665.....147161
..32..137..83..401..1604...4604...19269....79664....307083....1300811
..64..301.137..952..4924..19269..116051...642696...3313121...19431636
.128..705.235.2258.16163..79664..642696..5133698..34716313..275351726
.256.1461.412.5275.46665.307083.3313121.34716313.330723200.3594724687
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..220
FORMULA
Empirical for column k:
k=1: a(n) = 2*a(n-1)
k=2: a(n) = 3*a(n-1) -2*a(n-2) +8*a(n-3) -20*a(n-4) +8*a(n-5) for n>6
k=3: [order 17] for n>19
k=4: [order 67] for n>70
EXAMPLE
Some solutions for n=5 k=4
..0..0..0..0. .0..0..0..0. .0..1..0..1. .0..1..1..0. .0..0..0..0
..1..0..0..1. .1..1..1..1. .1..0..1..0. .0..0..1..0. .1..0..0..1
..1..0..0..1. .0..1..1..0. .0..1..0..1. .1..1..1..0. .0..0..1..0
..0..0..0..0. .0..1..1..1. .1..0..1..0. .0..0..1..1. .0..0..0..1
..1..1..1..1. .1..0..0..0. .0..0..1..1. .1..1..0..0. .1..0..0..0
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Feb 22 2018
STATUS
approved