103550domain: NAppears in sequencesNumber of sequences of n integers p(i), i=0..n-1, with 0 <= p(i) <= 2*i and |p(i) - p(i-1)| <= 2.at n=8A180898T(n,k)=number of sequences of n integers p(i) i=0..n-1 0<=p(i)<=k*i and |p(i+1)-p(i)|<=k.at n=53A180906Number of Schroeder paths of semilength n up to reversal.at n=9A378939