N= 6 b/a=0.5: lambda_N=0.111111111111111  R=-9.2983e-41  A*_f1=5.7397e-41  A=1.256692
N= 8 b/a=0.5394187523: lambda_N=0.0735547721269535  R=-3.8274e-10  A*_f1=-5.745e-10  A=1.5010137
N=10 b/a=0.5543486017: lambda_N=0.0500138134550259  R=-1.731e-10  A*_f1=-2.7946e-10  A=1.6144917
N=12 b/a=0.5618074057: lambda_N=0.0357953014621733  R=-1.0688e-10  A*_f1=-1.7907e-10  A=1.6755029
N=16 b/a=0.568831376: lambda_N=0.0207146752809278  R=-2.0164e-10  A*_f1=-3.5006e-10  A=1.7360354
N=8: root of R in b/a = 0.539418752362
N=10: root of R in b/a = 0.55434860173
nice -n 10 python -I   2.49s user 0.02s system 99% cpu 2.504 total
