169789022208domain: NAppears in sequencesa(n) = Sum_{k=0..2n} (k+1) * A026519(n, k).at n=25A027266a(n) = Sum_{k=0..2n} (k+1) * A026552(n, k).at n=25A027276a(n) = n*6^n.at n=13A036292The second largest value of permanent of (0,1) square matrices of order n with row and column sums equal to 3.at n=14A232636