Connell sequence: 1 odd, 2 even, 3 odd, ...

Terms

a(0) =1a(1) =2a(2) =4a(3) =5a(4) =7a(5) =9a(6) =10a(7) =12a(8) =14a(9) =16a(10) =17a(11) =19a(12) =21a(13) =23a(14) =25a(15) =26a(16) =28a(17) =30a(18) =32a(19) =34a(20) =36a(21) =37a(22) =39a(23) =41a(24) =43a(25) =45a(26) =47a(27) =49a(28) =50a(29) =52