Number of letters in n (in Finnish).

Terms

a(0) =5a(1) =4a(2) =5a(3) =5a(4) =5a(5) =5a(6) =5a(7) =9a(8) =9a(9) =8a(10) =8a(11) =10a(12) =11a(13) =11a(14) =11a(15) =11a(16) =11a(17) =15a(18) =15a(19) =14a(20) =13a(21) =17a(22) =18a(23) =18a(24) =18a(25) =18a(26) =18a(27) =22a(28) =22a(29) =21