Number of letters in n (in Polish), excluding spaces and hyphens.

Terms

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