I posted my settings -- not sure if you could view them. Both HT and VHT are enabled, channel width is 20MHz. I don't want 80MHz channels enabled because of density. Airwave seems to show 80MHz connections and the output of 'show ap detail ap-name' isn't clear:
AP "ana_W104B_3ece" Radio 0 Operating Information
-------------------------------------------------
Item Value Source
---- ----- ------
Very High throughput Enabled Configuration
High throughput Enabled Configuration
Mode AP Configuration
Band 802.11a
Primary Channel 36 ARM
80MHz Channel Group 36-48 ARM
EIRP 18 ARM