Typical LM317 resistor values
This page lets you enter the desired voltage and then calculates optimal values for the resistors. You can choose the resistors' series. For instance, if you select the E12 series, it will find the best match with resistors from the E12 series. Obviously E96 series will give better matches.



Some examples, with E12 (10%) resistors:   


3.3V: 1k2 + 1k8 \$\rightarrow\$ 3% error  
5V: 270 &Omega; + 820 &Omega; \$\rightarrow\$ 2% error
9V: 560 &Omega; + 3k3 \$\rightarrow\$ 2% error
12V: 390 &Omega; + 3k3 \$\rightarrow\$ less than 1% error
15V: 1k2 + 12k \$\rightarrow\$ 4% error
24V: 560 &Omega; + 10k \$\rightarrow\$ less than 1% error


(the first resistor is R1)

For comparison, with E96 (1%) resistors, all of the following have less than 1% error:


3.3V: 365 &Omega; + 590 &Omega;  
5V: 1k02 + 2k94
9V: 71.5 &Omega; + 442 &Omega;
12V: 392 &Omega; + 3k32
15V: 590 &Omega; + 6k34
24V: 1k24 + 21k5