%I#8 2018年10月24日06:02:35
%2606361220235645008594164483167260362116180223768428429680,
%电话:82203215841643047968584852011216480216032484152647279692176,
%电话153032384294531296565871200108633003220873798724014989408
%N(N+1)X(2+1)0..2数组的数目,每个2X2子块的上中位数与其水平和垂直相邻块的上中位数正好相差一。
%H R.H.Hardin,n表,n=1..210的a(n)</a>
%F经验:当n>12时,a(n)=3*a(n-3)+10*a(n-4)-12*a(n7)-6*a(-n8)。
%F经验公式:2*x*(130+318*x+610*x^2+788*x^3-4*x^4-713*x^5-1410*x^6-1134*x^7-614*x^8-324*x|9-68*x^10+5*x^11)/(1-3*x|3-10*x|4+12*x^7+6*x^8)_科林·巴克,2018年10月24日
%e n=5的一些解决方案:
%e。。2..1..1....1..1..2....0..1..0....2..0..1....2..2..1....0..1..1....0..1..2
%e。。0..2..1....0..2..1....2..0..0....2..1..0....1..0..0....0..0..2....1..2..1
%e。。0..1..2....2..1..0....2..1..2....0..0..0....2..1..0....1..2..1....2..0..0
%e。。0..0..0....0..0..0....0..0..2....0..1..2....1..2..0....2..1..0....1..0..1
%e。。2..1..0....0..1..2....1..0..1....1..2..1....0..1..2....0..0..0....0..0..2
%e。。2..0..2....0..2..1....1..2..2....2..1..1....0..0..0....0..1..2....1..2..0
%A237637的Y列2。
%K nonn公司
%O 1,1
%A.R.H.Hardin_,2014年2月10日
|