1) This is the OID for the total number of wireless clients on the AP : .1.3.6.1.4.1.1916.2.131.50.1.4.2.25.1.1.1.4.
2) This OID give you the total number of clients OID value : .1.3.6.1.4.1.1916.2.131.50.1.4.2.25.10.1.1.22
I believe we don't have OID to provide the information about the number of adopted AP.