Hi OP, we looked at many schools for S #1 with strong math and art. He is also into representational, not abstract.
He liked Williams and did Math Camp there but ended up doing EA at another school and thus did not apply.
Top contenders:
RISD/Brown dual degree
WashU dual degree
Yale
Swarthmore has an amazing professor whose work he adored. Small department, tho. Carnegie Mellon has interesting programs but not a fit. He considered Cornell but it is just too big for him for undergrad. Wesleyan and Skidmore were interesting though more abstract. UVa has a mentoring program for which students submit a portfolio and come in as art scholars.
We looked at a lot of LACs but since the art depts were so small and course offerings so limited it seemed that there would not be enough critical mass. This was not our impression of Williams,however!
I suggest you look at the number of profs, their websites and examples of their work, where they got their degrees, how many and what studio classes are offered each year, and the flexibility of core classes/distribution requirements to see if students will have enough freedom to pursue studio art.
please come back and let us know how it goes.