-10     2.30258509299404590000
-9.50000        2.35137525716347760000
-9      2.39789527279837070000
-8.50000        2.44234703536920430000
-8      2.48490664978800040000
-7.50000        2.52572864430825560000
-7      2.56494935746153670000
-6.50000        2.60268968544438370000
-6      2.63905732961525840000
-5.50000        2.67414864942652870000
-5      2.70805020110221010000
-4.50000        2.74084002392520090000
-4      2.77258872223978110000
-3.50000        2.80336038090653480000
-3      2.83321334405621620000
-2.50000        2.86220088092946860000
-2      2.89037175789616450000
-1.50000        2.9177707320842790000
-1      2.94443897916644030000
-0.50000        2.97041446556970090000
0       2.99573227355399090000
0.50000 3.02042488614436260000
1       3.0445224377234230000
1.50000 3.0680529351336170000
2       3.09104245335831610000
2.50000 3.11351530921037420000
3       3.13549421592914970000
3.50000 3.15700042115011350000
4       3.17805383034794580000
4.50000 3.19867311755068150000
5       3.21887582486820060000
5.50000 3.23867845216438030000
6       3.25809653802148210000
6.50000 3.27714473299217660000
7       3.29583686600432910000
7.50000 3.31418600467252580000
8       3.33220451017520380000
8.50000 3.34990408727460490000
9       3.36729582998647410000
9.50000 3.38439026334577430000
10      3.40119738166215550000

log(x+20)
41