1033412domain: NAppears in sequencesPartial sums of Catalan numbers (A000108).at n=13A014137Position of A075165(n+1) in A014486.at n=42A075161Bisection of A014137.at n=6A099975Position of A106455(n+1) in A014486.at n=60A106451a(n) = Sum_{k=0..floor(n/2)} Catalan(k).at n=26A110199a(n) = Sum_{k=0..floor(n/2)} Catalan(k).at n=27A110199