Numbers having, in base 3, (sum of even run lengths)=(sum of odd run lengths).

Terms

a(0) =28a(1) =29a(2) =31a(3) =35a(4) =37a(5) =38a(6) =42a(7) =43a(8) =45a(9) =49a(10) =51a(11) =52a(12) =55a(13) =56a(14) =58a(15) =62a(16) =63a(17) =66a(18) =68a(19) =71a(20) =73a(21) =74a(22) =75a(23) =77a(24) =2197a(25) =2198a(26) =2200a(27) =2202a(28) =2203a(29) =2206