a(n) = ((2n-1)^(2n+1) + (2n+1)^(2n-1))/(2n)^2 = A154682(n)/(2n)^2 for n > 0.
A233446
a(n) = ((2n-1)^(2n+1) + (2n+1)^(2n-1))/(2n)^2 = A154682(n)/(2n)^2 for n > 0.
Terms
- a(0) =1a(1) =23a(2) =2637a(3) =705259a(4) =337390073a(5) =252186614847
External references
- oeis: A233446