-4661domain: ZAppears in sequencesPartial sums of A127511.at n=12A127513First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 181", based on the 5-celled von Neumann neighborhood.at n=37A270629a(n) = Sum_{k=1..n} (-1)^k*k^3*floor(n/k).at n=20A366917