1958460domain: NAppears in sequencesCoordination sequence for A_6 lattice.at n=12A008387a(n) = Sum_{k=0..n-1} T(n,k) * T(n,k+1), with T given by A026615.at n=10A026957Number of integer sequences of length n+1 with sum zero and sum of absolute values 24.at n=5A157061