62500000000
domain: N
Appears in sequences
- Fourth binomial transform of C(n+2,2).at n=14A081894
- Squares that remain squares when prefixed with a 5.at n=7A167039
- Number of (2+1) X (n+1) arrays of permutations of 0..n*3+2 with each element having index change +-(.,.) 0,0 1,0 or 1,2.at n=14A264273
- Square array T(n,k), n >= 1, k >= 1, read by antidiagonals, where T(n,k) = Product_{a=1..n-1} Product_{b=1..k-1} (4*sin(a*Pi/n)^2 + 4*sin(b*Pi/k)^2).at n=40A340560
- a(n) = Product_{1<=j,k<=n-1} (4*sin(j*Pi/n)^2 + 4*sin(k*Pi/n)^2).at n=4A340562