1038984

Appears in sequences

• Coordination sequence for 6-dimensional cubic lattice.at n=18A008414
• Coordination sequence for C_6 lattice.at n=9A019562
• Triangle, read by rows, T(n,k)=k/n*Sum_{i=0..n-k} C(2*n,n-k-i)*C(2*n+i-1,i).at n=38A257532
• a(n) = [x^(3*n)] ( (1 + x)/(1 - x) )^n.at n=6A333715
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where T(n,k) is the coefficient of x^(k*n) in expansion of ( (1 + x)/(1 - x) )^n.at n=51A336521
• Square array read by ascending antidiagonals: T(n,k) = [x^(n*k)] ((1 + x)/(1 - x))^k for n, k >= 1.at n=33A363418