Euler's totient of numbers containing in their decimal representation only the digits 0 and 1.

Terms

a(0) =1a(1) =4a(2) =10a(3) =40a(4) =100a(5) =40a(6) =72a(7) =400a(8) =720a(9) =400a(10) =672a(11) =400a(12) =732a(13) =288a(14) =1000a(15) =4000a(16) =9792a(17) =2880a(18) =6440a(19) =4000a(20) =5184a(21) =2688a(22) =10110a(23) =4000a(24) =6912a(25) =2928a(26) =7920a(27) =2880a(28) =10432a(29) =4000