152166domain: NAppears in sequencesGeneralized tangent numbers d(6,n).at n=2A000411Generalized tangent numbers d_(n,3).at n=5A000488Generalized Euler numbers.at n=5A001587Shanks's array d_{a,n} (a >= 1, n >= 1) that generalizes the tangent numbers, read by antidiagonals upwards.at n=30A235606Main diagonal of A349271.at n=5A349263