%I #13 Jan 18 2024 07:46:36
%S 0,1,3,4,7,12,12,19,22,29,25,40,29,48,59,85,42,83,53,93,99,96,64,175,
%T 144,113,159,161,97,235,100,297,187,165,231,274,111,200,224,386,156,
%U 398,149,303,425,248,152,733,450,513,332,359,181,572,448,648,384,361,221,786
%N a(n) is the number of values taken by cos(2*Pi/k) mod n for all k in 1..n-1.
%C See A164823 for explanatory comment and the definition of "cos(x) mod j".
%H Christopher Hunt Gribble, <a href="/A164831/b164831.txt">Table of n, a(n) for n = 1..1000</a>.
%Y Cf. A164822, A164823, A164846, A165252.
%K nonn
%O 1,3
%A _Christopher Hunt Gribble_, Aug 27 2009
%E Edited by _N. J. A. Sloane_, Sep 01 2009
%E Sequence corrected by _Christopher Hunt Gribble_, Sep 10 2009