This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A290634 #26 Aug 17 2020 11:05:56 %S A290634 17,19,31,38,47,59,61,62,71,85,91,101,103,107,109,118,121,133,137,149, %T A290634 151,157,167,181,187,197,211,217,218,223,227,229,241,247,257,259,263, %U A290634 266,269,271,283,289,305,311,313,314,317,327,331,334,337,347,349,353,355,361,367 %N A290634 Positive integers which are never the quotient of phi(n)/tau(n). %C A290634 For phi(n)/tau(n) see A279287/A279288. %C A290634 Numbers that do not appear in A175667. %C A290634 The first nine terms of this sequence are exactly A119480(3) through A119480(11), and many other terms are common to these two sequences. %Y A290634 Cf. A000010, A000005, A020491, A015733, A020488, A062516, A175667, A112954, A112955, A119480, A289585, A279287/A279288. %K A290634 nonn %O A290634 1,1 %A A290634 _Bernard Schott_, Aug 08 2017