a(0) = 2, thereafter a(n+1) is the nearest integer to 4*a(n)/3.

Terms

a(0) =2a(1) =3a(2) =4a(3) =5a(4) =7a(5) =9a(6) =12a(7) =16a(8) =21a(9) =28a(10) =37a(11) =49a(12) =65a(13) =87a(14) =116a(15) =155a(16) =207a(17) =276a(18) =368a(19) =491a(20) =655a(21) =873a(22) =1164a(23) =1552a(24) =2069a(25) =2759a(26) =3679a(27) =4905a(28) =6540a(29) =8720