Numbers k such that s(k) = s(k+1) but phi(k) != phi(k+1), where s(k) = phi(k) + phi(phi(k)) + ... + 1 is the sum of iterated phi (A092693).

A291177

Numbers k such that s(k) = s(k+1) but phi(k) != phi(k+1), where s(k) = phi(k) + phi(phi(k)) + ... + 1 is the sum of iterated phi (A092693).

Terms

    a(0) =45a(1) =297a(2) =356a(3) =375a(4) =1335a(5) =1935a(6) =3915a(7) =4743a(8) =5271a(9) =6015a(10) =6375a(11) =6903a(12) =20894a(13) =22311a(14) =25347a(15) =28118a(16) =31664a(17) =32384a(18) =39632a(19) =49155a(20) =50954a(21) =55935a(22) =59984a(23) =64514a(24) =70275a(25) =119324a(26) =125054a(27) =162944a(28) =209715a(29) =334304

External references