OFFSET
1,1
COMMENTS
Row 4 of A240192
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 27*a(n-1) -294*a(n-2) +1660*a(n-3) -4909*a(n-4) +4008*a(n-5) +28110*a(n-6) -141830*a(n-7) +316164*a(n-8) -141103*a(n-9) -1161198*a(n-10) +2896480*a(n-11) -1515959*a(n-12) -3659154*a(n-13) +5143300*a(n-14) -13602*a(n-15) -280443*a(n-16) -7998970*a(n-17) +9853042*a(n-18) +2165540*a(n-19) -18119292*a(n-20) +21393552*a(n-21) -1551144*a(n-22) -20485792*a(n-23) +14878784*a(n-24) +4182464*a(n-25) -7981312*a(n-26) +1462784*a(n-27) +1097728*a(n-28) -368640*a(n-29) for n>34
EXAMPLE
Some solutions for n=4
..2..0..0..0....2..0..0..0....2..0..0..0....2..0..0..0....2..0..0..0
..1..2..2..0....1..0..2..2....1..2..2..2....1..2..2..2....1..0..2..0
..2..1..1..3....1..3..2..0....2..1..2..2....2..1..2..0....1..3..2..3
..1..3..3..2....2..3..0..0....1..3..3..2....1..3..3..2....2..1..0..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 02 2014
STATUS
approved