OFFSET
1,1
COMMENTS
Column 4 of A223218
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 36*a(n-1) +219*a(n-2) -5538*a(n-3) +3051*a(n-4) +141678*a(n-5) -180657*a(n-6) -980802*a(n-7) +1136403*a(n-8) +1765044*a(n-9) -1679697*a(n-10) -991440*a(n-11) +763668*a(n-12) +60264*a(n-13) -77760*a(n-14) +7776*a(n-15)
EXAMPLE
Some solutions for n=3
..3..1..2..4....0..1..4..3....1..3..4..2....4..5..2..1....3..1..0..1
..4..2..0..2....1..2..5..4....3..1..2..5....3..4..1..4....1..4..1..4
..5..4..1..4....2..5..4..3....1..0..1..2....1..2..0..2....3..1..2..5
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 18 2013
STATUS
approved