1335008domain: NAppears in sequencesPermanent of the symmetric n X n matrix A defined by A[i,j] = |i-j| for 1 <= i,j <= n.at n=7A085807The permanent of the distance matrix of the rooted tree having Matula number n.at n=24A206489The permanent of the distance matrix of the rooted tree having Matula number n.at n=32A206489