Numbers k such that Product_{d|k} phi(d) = Product_{d|(k+1)} phi(d) where phi(x) = Euler totient function (A000010).
A248795
Numbers k such that Product_{d|k} phi(d) = Product_{d|(k+1)} phi(d) where phi(x) = Euler totient function (A000010).
Terms
- a(0) =1a(1) =3a(2) =5a(3) =15a(4) =255a(5) =65535a(6) =2200694a(7) =2619705a(8) =6372794a(9) =40588485a(10) =76466985a(11) =81591194a(12) =118018094a(13) =206569605a(14) =470542485a(15) =525644385a(16) =726638834a(17) =791937614a(18) =971122514a(19) =991172805a(20) =1268457014a(21) =1384822005a(22) =1613055045a(23) =1709460753a(24) =1861556654a(25) =1872619665a(26) =2507927414a(27) =2659263945
External references
- oeis: A248795