a(n) = 2^(n-1)*((2*n)!/n!) * Integral_{t=0..Pi/3} sin(t)^(2*n-1) dt.
A123130
a(n) = 2^(n-1)*((2*n)!/n!) * Integral_{t=0..Pi/3} sin(t)^(2*n-1) dt.
Terms
- a(0) =1a(1) =5a(2) =53a(3) =867a(4) =19239a(5) =539925a(6) =18338445a(7) =731412675a(8) =33511100175
External references
- oeis: A123130