117074domain: NAppears in sequencesa(n) = 2*(3^n) - 2^n.at n=10A027649Number of permutations of {1,2,3,...,n} where, for 1 < i <= n, the i-th number has maximized sum of the i-1 absolute differences from all previous numbers of the permutation.at n=20A095698Number of permutations of 1..n with i-10<=p(i)<=i+2.at n=11A179362