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评论
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关联的三角形H_{p,j},p>=1,1<=j<=p,a(n)=Sum_{j=1..p}j*H_{p,j}中的行和A001678号,开始:
1;
0, 0;
1, 0, 0;
1, 0, 0, 0;
1,0,1,0,0;
1, 1, 1, 0, 0, 0;
2, 2, 1, 0, 1, 0, 0;
1, 4, 2, 2, 1, 0, 0, 0;
3, 4, 4, 5, 2, 0, 1, 0, 0;
3、7、7、9、4、4、1、0、0、0;
5, 9, 15, 14, 11, 9, 3, 0, 1, 0, 0;
4, 14, 23, 28, 25, 19, 7, 6, 1, 0, 0, 0;
11, 15, 39, 46, 55, 38, 24, 14, 5, 0, 1, 0, 0;
6, 32, 54, 86, 97, 86, 64, 36, 11, 9, 1, 0, 0, 0;
(结束)
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