If n = 10k+m (0 <= m <= 9) then a(n) = n*k^m.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =10a(10) =11a(11) =12a(12) =13a(13) =14a(14) =15a(15) =16a(16) =17a(17) =18a(18) =19a(19) =20a(20) =42a(21) =88a(22) =184a(23) =384a(24) =800a(25) =1664a(26) =3456a(27) =7168a(28) =14848a(29) =30