1102080domain: NAppears in sequencesa(n) = [x^n] 24*(-40*x^4 + 49*x^3 - 15*x^2 + 13*x + 2) / (1 - 4*x)^(9/2).at n=4A344401Numbers k such that A051378(k) > 2*k and A333926(k) <= 2*k.at n=18A349284