%I #22 Mar 24 2020 11:14:04

%S 2,3,10,14,15,56,57,59,70,85,105,107,116,136,209,267,295,323,352,393,

%T 415,442,530,551,645,646,760,855,1197,1288,1342,1415,1472,1496,1625,

%U 1765,1953,2002,2255,2485,2847,2945,3039,3382,3591,3745,3905,4233,4264,4313

%N Numbers k such that k-1 divides tau(k), where tau(k)=A000594(k) is Ramanujan's tau function.

%C Numbers k such that A299204(k) = 0.

%H Seiichi Manyama, <a href="/A299205/b299205.txt">Table of n, a(n) for n = 1..500</a>

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/TauFunction.html">Tau Function</a>

%o (PARI) isok(n) = (ramanujantau(n) % (n-1)) == 0; \\ _Michel Marcus_, Feb 05 2018

%Y For the sequence when n is prime see A299172.

%Y Cf. A000594, A063938, A299157, A299204.

%K nonn

%O 1,1

%A _Seiichi Manyama_, Feb 05 2018