252186614847domain: NAppears in sequencesa(n) = ((2n-1)^(2n+1) + (2n+1)^(2n-1))/(2n)^2 = A154682(n)/(2n)^2 for n > 0.at n=5A233446a(n) = ((n-1)^(n+1) + (-1)^n*(n+1)^(n-1))/(n^2).at n=11A234252