184758domain: NAppears in sequencesNumber of rectangular standard Young tableaux with n cells.at n=17A067228a(n) = Sum_{k=0..n} binomial(10*n,10*k).at n=2A070833a(n) = n^4 - n^3 - n^2 - n.at n=21A152016Cogrowth sequence of the 20-element group C10 X C2 = <S,T | S^10, T^2, [S,T]>.at n=10A378254