OFFSET
1,1
COMMENTS
Column 1 of A236624
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 304*a(n-3) +4012*a(n-4) +21408*a(n-5) +131544*a(n-6) +480256*a(n-7) +1095762*a(n-8) +2382528*a(n-9) -7588872*a(n-10) -47015904*a(n-11) -158803396*a(n-12) -569595744*a(n-13) -679250552*a(n-14) -333197568*a(n-15) +2056975591*a(n-16) +18914327296*a(n-17) +34799954216*a(n-18) +64591344816*a(n-19) +115113338336*a(n-20) -23416566272*a(n-21) -143590120832*a(n-22) -350090976000*a(n-23) -1031067717376*a(n-24) -1144206867456*a(n-25) -1239076647936*a(n-26) -1669973962752*a(n-27) -1104748867584*a(n-28) -692833222656*a(n-29) -631651958784*a(n-30) -206009008128*a(n-31)
EXAMPLE
Some solutions for n=3
..3..2....3..1....0..0....2..0....1..2....0..0....1..0....0..0....1..1....1..1
..3..3....1..3....0..2....0..1....2..1....3..2....1..0....2..0....3..3....1..1
..1..0....0..0....0..3....1..0....1..3....0..1....2..2....3..0....3..1....3..3
..1..0....2..0....3..3....1..2....3..3....2..2....0..2....1..3....2..0....0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 29 2014
STATUS
approved