a(n) = 11*2^n.

Terms

a(0) =11a(1) =22a(2) =44a(3) =88a(4) =176a(5) =352a(6) =704a(7) =1408a(8) =2816a(9) =5632a(10) =11264a(11) =22528a(12) =45056a(13) =90112a(14) =180224a(15) =360448a(16) =720896a(17) =1441792a(18) =2883584a(19) =5767168a(20) =11534336a(21) =23068672a(22) =46137344a(23) =92274688a(24) =184549376a(25) =369098752a(26) =738197504a(27) =1476395008a(28) =2952790016a(29) =5905580032