200787

Appears in sequences

• Gaussian binomial coefficient [n, 4] for q = 2.at n=4A006097
• Gaussian binomial coefficient [ 2n,n ] for q=2.at n=4A006098
• Gaussian binomial coefficient [ n, n/2 ] for q=2.at n=8A006099
• Triangle of Gaussian binomial coefficients (or q-binomial coefficients) [n,k] for q = 2.at n=40A022166
• Number of sublattices of index n in generic 5-dimensional lattice.at n=15A038992
• Z(S_m; sigma[1](n), sigma[2](n),..., sigma[m](n)) where Z(S_m; x_1,x_2,...,x_m) is the cycle index of the symmetric group S_m and sigma[k](n) is the sum of k-th powers of divisors of n; m=4.at n=15A068021
• Numbers k such that sigma(k-phi(k)) = phi(k).at n=28A070170
• Square array T(n, k) = q-binomial(2*n, n, k+1), read by antidiagonals.at n=19A156914
• Irregular table: list of symmetric n X n matrices made from 2-binomial coefficients, read by rows, where the k-th row of any n X n matrix is filled with binomial coefficients [k-1,k-1]..[k+n-2,k-1] (for q=2).at n=54A260638