n - reversal of hexadecimal (base 16) digits of n (written in base 10).

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =0a(10) =0a(11) =0a(12) =0a(13) =0a(14) =0a(15) =0a(16) =15a(17) =0a(18) =-15a(19) =-30a(20) =-45a(21) =-60a(22) =-75a(23) =-90a(24) =-105a(25) =-120a(26) =-135a(27) =-150a(28) =-165a(29) =-180