OFFSET
1,2
COMMENTS
Table starts
....1..........3..........5............11..............26..............55
....3.........75........235..........4267...........72764..........527311
....5........235.......2031.........31940.........1002328........17873307
...11.......4267......31940.......8205996.......661278762.....50708665808
...26......72764....1002328.....661278762...1028618143516.167704908247475
...55.....527311...17873307...50708665808.167704908247475
..119....7155883..329266534.8616991831997
..263..100785131.7935241725
..573.1027584101
.1248
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..60
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1) +a(n-2) +3*a(n-3) +a(n-4).
k=2: [order 30].
EXAMPLE
Some solutions for n=3, k=4
..1..4..5..2....1..3..4..0....0..4..0..0....2..1..0..0....1..2..3..0
..3..0..0..0....0..8..1..2....0..0..8..4....1..7..8..0....0..7..8..0
..1..4..5..0....2..1..2..3....0..0..0..1....0..3..0..0....2..1..3..0
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Dec 19 2015
STATUS
approved