OFFSET
1,2
COMMENTS
Table starts
......0..........6.............60................450...................3000
......6........432..........11280.............250992................5125008
.....60......11280.........943488...........68182800.............4546948272
....450.....250992.......68182800........16086672048..........3515869538472
...3000....5125008.....4546948272......3515869538472.......2524680110862912
..18750...99482544...288987039048....733651366146384....1733054018904626400
.112500.1867222224.17784013336560.148379658813705408.1153865935196746139616
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..112
FORMULA
Empirical for column k:
k=1: a(n) = 10*a(n-1) -25*a(n-2)
k=2: a(n) = 30*a(n-1) -197*a(n-2) -420*a(n-3) -196*a(n-4) for n>5
k=3: [order 10] for n>11
k=4: [order 28] for n>29
EXAMPLE
Some solutions for n=2 k=4
..3..2..0..2. .3..0..2..5. .3..0..4..5. .3..0..1..5. .0..4..2..3
..0..0..0..4. .2..0..1..1. .1..4..4..4. .1..0..0..1. .4..4..0..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Mar 06 2016
STATUS
approved