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A118469号
按行读取的三角形:a(n,m)=如果(n=1,则为1,否则为素数(n)-1+Sum_{k=n.m}(素数(k+1)-素数(k))/2)。
0
1, 1, 3, 1, 4, 5, 1, 6, 7, 8, 1, 7, 8, 9, 11, 1, 9, 10, 11, 13, 14, 1, 10, 11, 12, 14, 15, 17, 1, 12, 13, 14, 16, 17, 19, 20, 1, 15, 16, 17, 19, 20, 22, 23, 25, 1, 16, 17, 18, 20, 21, 23, 24, 26, 29, 1, 19, 20, 21, 23, 24, 26, 27, 29, 32, 33, 1, 21, 22, 23, 25, 26, 28, 29, 31, 34, 35
抵消
1,3
评论
一种改进的三角哥德巴赫序列,其中间隙和从n开始。
例子
1
1, 3
1, 4, 5
1, 6, 7, 8
1, 7, 8, 9, 11
1, 9, 10, 11, 13, 14
1, 10, 11, 12, 14, 15, 17
1, 12, 13, 14, 16, 17, 19, 20
1, 15, 16, 17, 19, 20, 22, 23, 25
1, 16, 17, 18, 20, 21, 23, 24, 26, 29
数学
t[n_,m_]:=如果[n==1,1,素数[n]+和[(素数[k+1]-素数[k])/2,{k,n,m}]-1];表[t[n,m],{m,11},{n,m}]//扁平
关键词
非n,
作者
罗杰·巴古拉2006年5月4日
状态
经核准的