Hati numbers: of form 2^i*3^j*k, i+j even, (k,6)=1.

Terms

a(0) =1a(1) =4a(2) =5a(3) =6a(4) =7a(5) =9a(6) =11a(7) =13a(8) =16a(9) =17a(10) =19a(11) =20a(12) =23a(13) =24a(14) =25a(15) =28a(16) =29a(17) =30a(18) =31a(19) =35a(20) =36a(21) =37a(22) =41a(23) =42a(24) =43a(25) =44a(26) =45a(27) =47a(28) =49a(29) =52