Powers of 11: a(n) = 11^n.

Terms

a(0) =1a(1) =11a(2) =121a(3) =1331a(4) =14641a(5) =161051a(6) =1771561a(7) =19487171a(8) =214358881a(9) =2357947691a(10) =25937424601a(11) =285311670611