Powers of cube root of 6 rounded up.

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =11a(5) =20a(6) =36a(7) =66a(8) =119a(9) =216a(10) =393a(11) =714a(12) =1296a(13) =2355a(14) =4280a(15) =7776a(16) =14130a(17) =25676a(18) =46656a(19) =84780a(20) =154055a(21) =279936a(22) =508678a(23) =924329a(24) =1679616a(25) =3052065a(26) =5545970a(27) =10077696a(28) =18312389a(29) =33275820