OFFSET
1,1
COMMENTS
Column 1 of A236505
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 308*a(n-3) +4012*a(n-4) +21992*a(n-5) +160712*a(n-6) +584652*a(n-7) +2312740*a(n-8) +6348544*a(n-9) +5341120*a(n-10) +3533664*a(n-11) -174342864*a(n-12) -458662976*a(n-13) -1214806208*a(n-14) -2349785088*a(n-15) +3981769152*a(n-16) +10164177792*a(n-17) +47276054208*a(n-18) +85298810880*a(n-19) -33867762176*a(n-20) -93314875904*a(n-21) -795814825216*a(n-22) -1288724156416*a(n-23) +207101892608*a(n-24) +543866948608*a(n-25) +6245665710080*a(n-26) +9033804898304*a(n-27) -3139783680000*a(n-28) -4668497395712*a(n-29) -17866459840512*a(n-30) -22658241527808*a(n-31) +17119004590080*a(n-32) +17563014660096*a(n-33) -3022314799104*a(n-34)
EXAMPLE
Some solutions for n=3
..0..1....3..2....2..2....0..3....0..0....3..3....0..0....0..0....2..2....1..0
..1..0....3..0....0..0....1..0....0..3....0..3....2..2....0..1....1..3....3..1
..3..3....0..1....3..1....2..1....2..2....1..0....0..2....1..3....1..1....2..1
..0..0....3..1....2..2....3..3....0..2....3..1....0..2....1..3....2..2....0..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 27 2014
STATUS
approved