a(n) = 11^n-n^2.

Terms

a(0) =1a(1) =10a(2) =117a(3) =1322a(4) =14625a(5) =161026a(6) =1771525a(7) =19487122a(8) =214358817a(9) =2357947610a(10) =25937424501a(11) =285311670490