47462domain: NAppears in sequencesa(n) = (Sum_{i=0..n-1} (-1)^i/b(i)) * LCM{b(i): i=0..n-1}, where b(i) = C(i,floor(i/2)).at n=13A025554Number of step cyclic shifted sequence structures using a maximum of two different symbols.at n=23A056429The number of antitransitive relations on n labeled nodes.at n=5A341473