Sum of digits of the n-th tetrahedral number.

Terms

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