Numbers k such that both k and k+1 are squarefree and phi(k) = phi(k+1), where phi is the Euler totient function (A000010).

A333875

Numbers k such that both k and k+1 are squarefree and phi(k) = phi(k+1), where phi is the Euler totient function (A000010).

Terms

    a(0) =1a(1) =194a(2) =3705a(3) =5186a(4) =25545a(5) =388245a(6) =1659585a(7) =2200694a(8) =2521694a(9) =2619705a(10) =3289934a(11) =3794834a(12) =4002405a(13) =5781434a(14) =6245546a(15) =6372794a(16) =8338394a(17) =12352934a(18) =14144954a(19) =16475414a(20) =22632285a(21) =23553705a(22) =37762394a(23) =40588485a(24) =43834754a(25) =44485454a(26) =59603954a(27) =63298785a(28) =76466985a(29) =81591194

External references