Numbers n such that tau(n) = tau(n+1) and phi(n) = phi(n+1).

Terms

a(0) =104a(1) =3255a(2) =22935a(3) =983775a(4) =1025504a(5) =2200694a(6) =2619705a(7) =4163355a(8) =4447064a(9) =4695704a(10) =6372794a(11) =9718904a(12) =11903775a(13) =23992215a(14) =26879684a(15) =29357475a(16) =37239735a(17) =40588485a(18) =41207144a(19) =48615735a(20) =56424555a(21) =76466985a(22) =81591194a(23) =83864055a(24) =113664135a(25) =118018094a(26) =166758015