- A nosotros nos gusta los panqueque. 

Depending on who the verb falls to, it can be one or another reflexive pronoun. 
They are classified as follows:
"To me" ⇝ "me" 
"To you" ⇝ "te" 
"To he/she" ⇝ "le" 
"To we" ⇝ "nos" 
"To you" ⇝ "os" 
"To they" ⇝ "les" 
In this case the verb falls to us, so it is replaced by "nos".
MissSpanish