Source CSV: https://public.tableau.com/views/TheColourofMusic/TheColourofMusic.csv?:showVizHome=no

Distinct rows where Album="25" and Artist="Adele":
Week,Album,Artist
1,25,Adele
7,25,Adele
8,25,Adele
10,25,Adele
11,25,Adele
12,25,Adele
26,25,Adele

Week numbers only: 1, 7, 8, 10, 11, 12, 26