OFFSET
1,5
COMMENTS
Table starts
..0.....1.......1..........2............3..............5.................8
..1.....3......11.........37..........129............450..............1568
..1....11......72........459.........2956..........18996............122043
..2....37.....459.......5362........63565.........753471...........8926774
..3...129....2956......63565......1396701.......30679527.........673550354
..5...450...18996.....753471.....30679527.....1248976325.......50812633429
..8..1568..122043....8926774....673550354....50812633429.....3830408271334
.13..5464..784108..105763972..14787165263..2067233940661...288757143760689
.21.19041.5037730.1253091915.324641851765.84103618035068.21768367076769721
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..241
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1) +a(n-2)
k=2: a(n) = 4*a(n-1) -2*a(n-2) +a(n-3) -a(n-4) for n>5
k=3: [order 9] for n>11
k=4: [order 41] for n>42
EXAMPLE
Some solutions for n=5 k=4
..0..0..1..1. .0..0..1..1. .0..0..0..0. .0..0..0..1. .0..0..0..1
..0..0..0..0. .0..0..0..0. .0..1..0..1. .1..1..1..0. .1..1..0..1
..0..1..1..1. .1..1..1..1. .1..1..1..1. .0..1..1..0. .1..0..1..1
..0..1..0..1. .0..1..1..1. .1..0..0..1. .0..0..0..0. .1..0..0..1
..1..0..1..1. .0..0..0..0. .1..1..0..1. .1..1..0..0. .0..1..1..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Mar 17 2018
STATUS
approved