A082774 - OEIS

%I #11 May 05 2023 12:21:35

%S 0,0,1,1,2,2,3,4,4,5,6,6,7,8,9,9,10,11,11,12,13,14,15,16,16,17,17,17,

%T 20,20,21,22,23,24,24,25,26,27,28,28,30,30,31,31,33,35,36,36,37,38,38,

%U 39,40,41,42,43,44,44,45,46,48,49,49,50,52,53,55,55,56,57,58,59,60,60,61

%N a(n) = floor(cot(2*Pi/prime(n))).

%e a(7) = 2 since prime(7) = 17 and floor(cot(2*Pi/17)) = 2.

%K nonn,less

%O 3,5

%A _Gary W. Adamson_, May 22 2003

%E More terms from _Ray Chandler_, Oct 11 2003