%I#9 2018年11月8日19:08:42
%第4814846014364488140404394013753243050813476524218704页,
%电话:132063604134177212941826040513730812682623483970233208,
%电话:124286212083890719330012179707527638127981825211935779240203736437636672
%N长度为N+20..3的数组的数目,没有三个连续项,任何两个元素的和等于第三个元素的两倍。
%H R.H.Hardin,n表,n=1..210的a(n)</a>
%F经验:a(n)=2*a(n-1)+3*a(n-2)+4*a(n3)-3*a(4-4)-12*a(v-5)-4*a(6-6)。
%F经验公式:4*x*(12+13*x+5*x^2-30*x^3-53*x^4-16*x^5)/(1-2*x-3*x^2-4*x^3+3*x*^4+12*x^5+4*x^6)_科林·巴克,2018年11月8日
%e n=6的一些解决方案:
%e。。0....0....0....1....0....2....2....2....2....3....3....1....2....2....0....2
%e。。3....1....3....1....3....3....1....0....3....0....3....1....2....2....3....2
%e。。1....3....1....3....3....0....1....3....3....3....1....0....3....0....2....1
%e。。3....3....3....0....1....0....3....0....2....0....1....1....0....2....0....1
%e。。1....1....0....0....0....3....1....2....3....1....2....0....3....3....0....2
%e。。3....0....3....3....3....3....3....3....3....0....1....0....0....0....2....2
%e。。1....1....0....0....1....0....1....0....2....3....2....2....0....3....0....1
%e。。1....3....2....1....0....0....3....0....2....0....2....2....1....0....2....1
%A248461的Y列3。
%K nonn公司
%O 1,1号机组
%A R.H.Hardin,2014年10月6日
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