28506

Appears in sequences

• Number of paths in K_6 X P_n joining two different vertices in K_6 from opposite sides.at n=1A145414
• Number of 5Xn integer arrays with each element equal to the number of horizontal and antidiagonal neighbors equal to itself.at n=10A266015
• Number A(n,k) of n-element subsets of [k*n] whose elements sum to a multiple of n. Square array A(n,k) with n, k >= 0 read by antidiagonals.at n=71A304482
• a(n) = Sum_{k=0..n-1} binomial(5*k-1,k) * binomial(5*n-5*k,n-k-1).at n=5A386566