Numbers n for which there is exactly one positive integer m such that n = floor(cot(Pi/(2m))).

Terms

a(0) =2a(1) =4a(2) =7a(3) =9a(4) =11a(5) =14a(6) =16a(7) =18a(8) =21a(9) =23a(10) =25a(11) =28a(12) =30a(13) =32a(14) =34a(15) =37a(16) =39a(17) =41a(18) =44a(19) =46a(20) =48a(21) =51a(22) =53a(23) =55a(24) =58a(25) =60a(26) =62a(27) =65a(28) =67a(29) =69