352485domain: NAppears in sequencesLeast k such that prime(n)^3 divides binomial(2k,k).at n=23A110496a(n) = n*(n+1)*(n^4 + 2*n^3 - 2*n^2 - 3*n + 3)/2.at n=9A152725First term of n-th difference sequence of (floor(k*r)), r = sqrt(6), k >= 0.at n=21A325670