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).
A340560
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).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =8a(5) =1a(6) =1a(7) =49a(8) =49a(9) =1a(10) =1a(11) =288a(12) =1296a(13) =288a(14) =1a(15) =1a(16) =1681a(17) =30625a(18) =30625a(19) =1681a(20) =1a(21) =1a(22) =9800a(23) =707281a(24) =2654208a(25) =707281a(26) =9800a(27) =1a(28) =1a(29) =57121
External references
- oeis: A340560