#来自在线整数序列百科全书的问候!http://oeis.org/ 搜索:id:a1668577 展示1-1的1个1 ;%I a1668577 %S a1668577;%S a168577 3,6,6,4,10,10,10,5,15,15,20,15,6,6,21,35,35,35,21,7,7,28,56,70,56,56,56,56,56,56,56,28,8,8,36,36,84126,;%T a168577 126,84,84,36,36,9,45120120210252210120,45,45,10,10,5516533053304624623300165,;%U A16857575757575757,11,66220495792924792495220,66,12,782867151287161716161287 %N a168577帕斯卡三角形,前两个删除列和对角线。 %C A168577行和是3,10,25,56,119,246。。(A000247);%F A168577 T(n,k)=[x^k]((x+1)^n-x^n-n*x-1),2<=k-->