2139108domain: NAppears in sequencesNumber of permutations of 1..n with the permutation and its inverse having a different number of maxima.at n=9A180390Number of (n+2)X(2+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 2 and no row sum 0 and no column sum 3.at n=28A255795