Sensi[19] with a brat of one

Which odd limit is sensi "basically"? You be the judge, but there is some real xenharmonic hooraw hidden away in here amongst the other stuff.

! sensi19br1.scl
Sensi[19] with a brat of 1
19
!
76.257330780373381909
129.88836294010183147
206.14569372047521346
259.77672588020366297
336.03405666057704494
389.66508882030549448
443.29612098003394384
519.55345176040732583
573.18448392013577534
649.44181470050915724
703.07284686023760674
779.33017764061098878
832.96120980033943817
886.59224196006788767
962.84957274044126970
1016.4806049001697190
1092.7379356805431011
1146.3689678402715506
1200.0000000000000000
! x^9 - 5x^7 + 20