a(n) = ( Product_{j=1..n} Product_{k=1..n+1} (4*sin((2*j-1)*Pi/n)^2 + 4*sin((2*k-1)*Pi/(n+1))^2) )^(1/4).
A341493
a(n) = ( Product_{j=1..n} Product_{k=1..n+1} (4*sin((2*j-1)*Pi/n)^2 + 4*sin((2*k-1)*Pi/(n+1))^2) )^(1/4).
Terms
- a(0) =1a(1) =2a(2) =14a(3) =50a(4) =722a(5) =9922a(6) =401998a(7) =19681538a(8) =2415542018a(9) =400448833106
External references
- oeis: A341493