Nialpdromes: digits in base 12 are in nonincreasing order.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =5a(6) =6a(7) =7a(8) =8a(9) =9a(10) =10a(11) =11a(12) =12a(13) =13a(14) =24a(15) =25a(16) =26a(17) =36a(18) =37a(19) =38a(20) =39a(21) =48a(22) =49a(23) =50a(24) =51a(25) =52a(26) =60a(27) =61a(28) =62a(29) =63