323816

Appears in sequences

• Number of -3..3 arrays x(i) of n+1 elements i=1..n+1 with set{t,u,v in 0,1}((x[i+t]+x[j+u]+x[k+v])*(-1)^(t+u+v)) having three, four, five, six or eight distinct values for every i,j,k<=n.at n=7A211753
• a(n) = number of permutations of (1,2,...,n) producible by an ordered triple of distinct transpositions.at n=14A253171