OFFSET
1,2
COMMENTS
Table starts
..1.......2...........5..............14................45...............163
..2......14.........187............3552.............93311...........3201247
..4.....122.......11051.........1880990.........555258347......256785961187
..7.....938......605969.......982227549.....3511764501993.23932385578547037
.12....6734....30785259....477324637497.20888913167378133
.20...45938..1470330667.217487430054270
.33..302402.67008101445
.54.1939154
.88
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..45
FORMULA
Empirical for column k:
k=1: a(n) = 2*a(n-1) -a(n-3)
k=2: a(n) = 14*a(n-1) -60*a(n-2) +50*a(n-3) +145*a(n-4) -80*a(n-5) -84*a(n-6) +16*a(n-7)
k=3: [order 20]
EXAMPLE
Some solutions for n=3 k=4
..0..0..1..2....0..0..0..0....0..0..0..1....0..0..0..1....0..0..1..2
..1..0..3..2....1..0..2..0....0..0..0..2....0..1..2..1....0..3..0..1
..4..4..3..4....3..4..3..1....3..4..2..0....3..2..2..3....2..3..2..0
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jan 24 2016
STATUS
approved