11^n + n^11.

Terms

a(0) =1a(1) =12a(2) =2169a(3) =178478a(4) =4208945a(5) =48989176a(6) =364568617a(7) =1996813914a(8) =8804293473a(9) =33739007300a(10) =125937424601a(11) =570623341222