I wrote: Can any of you mathemusicians spot the significance of the sequence

10,12,18,21,25,30?

It's the sequence of accented notes in the "Les Augures Printaniers" section of Le Sacre du Printemps by Stravinsky ( https://www.youtube.com/watch?v=XwMjDJPKGig). I suppose there's potential math to be made here, given that Stravinsky clearly wanted the sequence to be devoid of patterns that would enable a listener to predict when the next accented beat would fall. One could construct a model of how listeners predict what a musical piece is going to do, based on conventions of Western music and on patterns laid down by earlier notes in the particular piece being listened to, and then see how well the Stravinsky passage thwarts this kind of extrapolation. Jim Propp