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评论
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电平和被定义为x(i,j,k)与i,j,k>=0和i+j+k=n的和。这给出3*A164039号(n-1)对于n>0。
用立方体的j,k>=0对x(1,j,k)进行切片:
1, 5, 11, 19, 29, 41, 55, 71, ...A028387号
1, 7, 19, 39, 69, 111, 167, 239, ...A108766号(k+1)
1, 9, 29, 69, 139, 251, 419, 659, ...
1, 11, 41, 111, 251, 503, 923, 1583, ...
1, 13, 55, 167, 419, 923, 1847, 3431, ...
1, 15, 71, 239, 659, 1583, 3431, 6863, ...
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