48760367domain: NPropertiesPrimalityPrimeyesAppears in sequencesPartial sums of Catalan numbers (A000108).at n=16A014137Bisection of A014137.at n=8A099869a(n) = Sum_{k=0..floor(n/2)} Catalan(k).at n=32A110199a(n) = Sum_{k=0..floor(n/2)} Catalan(k).at n=33A110199Prime numbersat n=2930978