48829domain: NAppears in sequencesa(n) = ceiling(5^n/n).at n=7A129789Expansion of x/((1 - x - x^4)*(1 - x)^8).at n=11A145137G.f.: A(x) = Sum_{n>=0} x^n/(1-x)^(n^2).at n=9A178325Number of convex topologies on an n-point totally ordered set.at n=6A234268a(n) = (n^4 + 5*n^3 + 11*n^2 + 7*n)/6.at n=22A332697