11^n-10^n+1^n.

Terms

a(0) =1a(1) =2a(2) =22a(3) =332a(4) =4642a(5) =61052a(6) =771562a(7) =9487172a(8) =114358882a(9) =1357947692a(10) =15937424602a(11) =185311670612