a(n) = A122111(A225546(n)).

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =7a(5) =5a(6) =19a(7) =6a(8) =9a(9) =11a(10) =53a(11) =10a(12) =131a(13) =23a(14) =13a(15) =8a(16) =311a(17) =15a(18) =719a(19) =22a(20) =29a(21) =59a(22) =1619a(23) =14a(24) =49a(25) =137a(26) =21a(27) =46a(28) =3671a(29) =17