%I#8 2018年11月2日12:28:03
%S 4,9,21,51127324844224360731673646892133443385271127352,
%电话:33394641000339530269129924221602844708208818045632750412037,
%电话:86251127922717430385685960269683272856760081868664396112
%N长度为N+2 0..5的数组的数目,一行中没有三个不相等的元素,新值0..5按0..5的顺序引入。
%H R.H.Hardin,n表,n=1..210的a(n)</a>
%F经验:a(n)=9*a(n-1)-25*a(n-2)+7*a(n-3)+64*a(n-4)-54*a(n-5)-48*a(n-6)+32*a(n-7)+16*a(n-8)。
%F经验公式:x*(4-27*x+40*x^2+59*x^3-126*x^4-51*x^5+80*x^6+32*x^7)/((1-x)*(1-2*x)*_科林·巴克,2018年11月2日
%e n=6的一些解决方案:
%e。。0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
%e。。1....0....1....0....1....1....1....1....0....0....1....0....0....0....0....1
%e。。1....0....1....0....1....0....0....1....1....1....1....0....0....1....1....1
%e。。1….0….2….1….1….1….0….2….1….0….1….1….1….1….1….1….0….0
%e。。0….0….2….1….2….1….1….1….2….0….1….1….1….2….2….1….1….1
%e。。1....0....0....1....2....0....1....2....2....2....1....2....0....2....1....0
%e。。1....1....0....1....2....1....0....2....2....2....0....2....0....3....0....0
%e。。1....1....1....1....3....1....1....2....3....0....1....1....0....2....1....2
%A243641的Y第5列。
%K nonn公司
%O 1,1号机组
%A R.H.Hardin,2014年6月8日
|