137356domain: NAppears in sequencesMolien series for a certain 16-dimensional group of order 20160.at n=19A104993Number T(n,k) of permutations p of [n] such that k is the maximum of the partial sums of the signed up-down jump sequence of 0,p; triangle T(n,k), n>=0, ceiling((sqrt(1+8*n)-1)/2)<=k<=n, read by rows.at n=27A316292