Sum of digits of pentagonal numbers.

Terms

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