Reversible Lynch-Bell numbers.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =7a(7) =8a(8) =9a(9) =216a(10) =612a(11) =2136a(12) =2196a(13) =2316a(14) =2364a(15) =2916a(16) =4236a(17) =4632a(18) =4896a(19) =6132a(20) =6192a(21) =6312a(22) =6324a(23) =6912a(24) =6984a(25) =21384a(26) =42816a(27) =48312a(28) =61248a(29) =61824