9238023domain: NAppears in sequencesa(n) = Sum_{k=0..n} binomial(n,k)*binomial(2*k,k).at n=11A026375a(n) = T(n,[ n/2 ]), where T is the array in A026374.at n=21A026380Triangle read by rows: T(n,k) (0<=k<=floor(n/2)) is the number of Delannoy paths of length n, having k ED's.at n=36A110221