by sequestered, do you mean it's undergoing foreclosure proceedings? or the bank already foreclosed and they bought the property at the auction?

the rule is that a new owner of the property may terminate the lease if there is no notice on the title re the lease or he is not aware of the lease prior to the purchase. but a bank has a greater responsibility in determining the circumstances of a property, so i'd think the are or should be aware that the property was under lease before the foreclosure.

if it was an extra-judicial foreclosure and the previous owner was a natural person (not a corporation), the ownership of the bank is not finalized until one year after the auction, but they have a right to possess the property immediately.

i'd suggest informing the bank asap that you are leasing the property and getting an idea of their position regarding this to ease your mind. good luck!