859520domain: NAppears in sequencesConvolution of C(2,2; n) := A064340(n) (generalized Catalan numbers) with itself.at n=7A067297Generalized Catalan triangle, based on C(2,2; n) = A064340(n).at n=35A067298Generalized Catalan triangle A067298 with row reversion.at n=28A067304