%I#8 2018年10月21日16:19:14
%电话:8126892827849628289121000008002561038560311820810785696,
%电话:323831041120110723363038721163253760349257113612080581376,
%电话:3627092684812545882982437667955302413029106216963911879237632
%N(N+1)X(1+1)0..2数组的数量,每个2X2子块的最大值加上最小值与其水平和垂直相邻块相差正好一。
%H R.H.Hardin,n表,n=1..210的a(n)</a>
%F经验:对于n>7,a(n)=8*a(n-2)+24*a(n-4)+8*a(n-6)。
%F经验g.F.:x*(81+268*x+280*x^2+640*x^3+260*x^4+208*x^5+64*x^6)/((1+2*x^2)*(1-10*x^2-4*x^4))。-_科林·巴克,2018年10月21日
%e n=5的一些解决方案:
%e。。2..1....1..2....0..2....1..0....0..2....2..1....2..0....1..0....2..1....2..1
%e。。0..0....0..0....1..0....2..1....0..0....2..2....0..1....1..0....1..0....0..0
%e。。1..0....1..0....0..1....1..1....1..0....0..1....0..0....2..1....1..1....1..0
%e。。2..2....2..2....2..2....1..1....1..2....0..1....2..2....1..2....1..1....2..2
%e。。1..1....1..2....1..1....2..2....1..1....1..2....1..2....0..1....0..0....1..2
%e。。0..2....1..0....1..1....0..0....0..2....2..1....2..0....0..1....0..2....0..0
%A237234的Y列1。
%K nonn公司
%O 1,1号机组
%A R.H.Hardin,2014年2月5日
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