Successively larger 3-ball ground-state site swaps of A084501 in concatenated decimal notation.

Terms

a(0) =3a(1) =33a(2) =42a(3) =333a(4) =342a(5) =423a(6) =441a(7) =522a(8) =531a(9) =3333a(10) =3342a(11) =3423a(12) =3441a(13) =3522a(14) =3531a(15) =4233a(16) =4242a(17) =4413a(18) =4440a(19) =4512a(20) =4530a(21) =5223a(22) =5241a(23) =5313a(24) =5340a(25) =5511a(26) =5520a(27) =6222a(28) =6231a(29) =6312