a(1) = 3, a(n) = round(a(n-1)*3/2) for n > 1, using round-to-even method.

Terms

a(0) =3a(1) =4a(2) =6a(3) =9a(4) =14a(5) =21a(6) =32a(7) =48a(8) =72a(9) =108a(10) =162a(11) =243a(12) =364a(13) =546a(14) =819a(15) =1228a(16) =1842a(17) =2763a(18) =4144a(19) =6216a(20) =9324a(21) =13986a(22) =20979a(23) =31468a(24) =47202a(25) =70803a(26) =106204a(27) =159306a(28) =238959a(29) =358438