n - reversal of base 6 digits of n (written in base 10).

Terms

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