If a resistor is not available as a standard value in the series E24, the series connection of two resistors is offered. The E24 basic series contains the following 24 values: 10, 11, 12, 13, 15, 16, 18, 20, 22, 24, 27, 30, 33, 36, 39, 43, 47, 51, 56, 62, 68, 75, 82, 91 Ω. Possible resistor combinations can be calculated on this website.

The idea for this calculation was created when reading the article in [1].
There, the calculation of the parallel connection of resistors is presented with an Excel file.

[1] Klaus Wollert, DL7KWB: miniRcalc zur Berechnung parallelgeschalteter Widerstände. Funkamateur 7/2016, S. 634-635