13997185024domain: NAppears in sequencesMedian Euler numbers (the middle numbers of Arnold's shuttle triangle).at n=8A000657Column of Kempner tableau.at n=16A005437Diagonal of Euler-Seidel matrix with start sequence e.g.f. 1-tanh(x).at n=8A099023Duplicate of A005437.at n=16A214267