OFFSET
1,1
COMMENTS
Column 1 of A237142
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 16*a(n-1) -1186*a(n-3) +4300*a(n-4) +29836*a(n-5) -178043*a(n-6) -268628*a(n-7) +3127196*a(n-8) -779130*a(n-9) -28579040*a(n-10) +32590712*a(n-11) +142648608*a(n-12) -254087072*a(n-13) -375342992*a(n-14) +955527424*a(n-15) +408264640*a(n-16) -1902301152*a(n-17) +178371840*a(n-18) +1899365760*a(n-19) -742376448*a(n-20) -734054400*a(n-21) +418037760*a(n-22)
EXAMPLE
Some solutions for n=4
..2..3....3..1....1..3....0..0....0..2....3..1....0..2....2..3....0..2....1..3
..3..3....3..0....3..1....1..3....1..2....0..3....3..3....2..2....3..0....0..2
..3..0....3..0....3..3....1..1....2..1....3..1....0..1....3..1....2..2....2..3
..3..3....0..3....3..3....1..3....1..2....3..1....3..3....1..2....0..3....2..1
..0..3....3..1....2..3....1..0....2..0....3..1....1..2....3..1....1..2....3..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 04 2014
STATUS
approved