Here is a link to the piano music sheet for Rachmaninoff's Rhapsody on a Theme of Paganini, Variation 23:
[Rhapsody on a Theme of Paganini, Variation 23](https://imslp.org/wiki/Rhapsody_on_a_Theme_of_Paganini_(Rachmaninoff)#Piano_Solo_Version)
This is the piano-only version of the variation, and it goes like C-D-E-B-G-C-B-G-D-E-C.
I hope this helps!