Elements to right of central elements in 3-Pascal triangle A028262.

Terms

a(0) =1a(1) =1a(2) =4a(3) =1a(4) =5a(5) =1a(6) =13a(7) =6a(8) =1a(9) =19a(10) =7a(11) =1a(12) =45a(13) =26a(14) =8a(15) =1a(16) =71a(17) =34a(18) =9a(19) =1a(20) =161a(21) =105a(22) =43a(23) =10a(24) =1a(25) =266a(26) =148a(27) =53a(28) =11a(29) =1