**Triangle T(n,r) = LCM(n,n-1,n-2,...,n-r+1)/LCM(1,2,3,...,r-1,r), 0 <= r < n.**

*1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 4, 6, 2, 1, 1, 5, 10, 10, 5, 1, 1, 6, 15, 10, 5, 1, 1, 1, 7, 21*

*1 seqfan posts*

Index of A-numbers in seqfan: by ascending order by month by frequency by keyword

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