201114700568domain: NAppears in sequencesa(n) = Sum_{k=0..2n-2} T(n,k) * T(n,k+2), with T given by A026519.at n=14A027264a(n) = Sum_{k=0..2n-2} T(n,k) * T(n,k+2), with T given by A026536.at n=15A027269