380162domain: NAppears in sequencesSeventh column of triangle A028364.at n=6A116870Half-convolution of Catalan sequence A000108 with itself.at n=12A201204Bisection of half-convolution of Catalan sequence A000108; even part.at n=6A201205a(n) = Sum_{k=0..n} k^2 * A000041(k).at n=18A259279