OFFSET
1,5
COMMENTS
Table starts
.1.....1......1........1..........1.............1...............1
.1.....5.....13.......42........127...........389............1192
.1....13.....22......124........409..........1921............8908
.1....42....124.....1156.......8117.........66626..........563826
.1...127....409.....8117.....107163.......1636306........25784604
.1...389...1921....66626....1636306......45356726......1300110664
.1..1192...8908...563826...25784604....1300110664.....67668568376
.1..3645..41933..4788445..403231105...36992129471...3503621681315
.1.11161.204016.41239301.6388232748.1065292018400.183337397269876
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..180
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1)
k=2: a(n) = a(n-1) +5*a(n-2) +4*a(n-3) with g.f. (1-x^2-x^3)/(1-x-5*x^2-4*x^3).
k=3: [order 13] for n>15
k=4: [order 47] for n>49
EXAMPLE
Some solutions for n=5 k=4
..0..0..0..1. .0..1..1..0. .0..1..1..0. .0..1..1..1. .0..0..1..1
..0..1..0..0. .1..1..0..0. .1..1..0..0. .1..1..0..1. .1..0..1..0
..1..1..0..1. .0..0..1..0. .1..0..1..1. .0..1..0..0. .1..1..0..0
..1..0..0..0. .0..0..1..1. .0..0..1..0. .1..1..0..0. .1..1..0..0
..0..0..0..1. .0..0..1..0. .0..0..0..0. .1..1..0..1. .1..1..0..0
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jan 15 2018
STATUS
approved