A290634 Positive integers which are never the quotient of phi(n)/tau(n).

17, 19, 31, 38, 47, 59, 61, 62, 71, 85, 91, 101, 103, 107, 109, 118, 121, 133, 137, 149, 151, 157, 167, 181, 187, 197, 211, 217, 218, 223, 227, 229, 241, 247, 257, 259, 263, 266, 269, 271, 283, 289, 305, 311, 313, 314, 317, 327, 331, 334, 337, 347, 349, 353, 355, 361, 367

Offset: 1

Author

Bernard Schott, Aug 08 2017

Keywords

• nonn

Comments

For phi(n)/tau(n) see A279287/A279288.

Numbers that do not appear in A175667.

The first nine terms of this sequence are exactly A119480(3) through A119480(11), and many other terms are common to these two sequences.

Crossrefs

Cf. A000010, A000005, A020491, A015733, A020488, A062516, A175667, A112954, A112955, A119480, A289585, A279287/A279288.