**Odd triangle !n. This table read by rows gives the coefficients of sum formulae of n-th Left factorials (A003422). The k-th row (6>=k>=1) contains T(i,k) for i=1 to k+1, where k=[2*n+3+(-1)^n]/4 and T(i,k) satisfies !n = Sum_{i=1..k+1} T(i,k) * n^(i-1) / (2*k-2)!.**

*0, 1, 4, 4, 0, 96, 396, 108, 0, 1012320, 192900, 64890, 11460, 90, 2038014720*

*2 seqfan posts*

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

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