Kim-sums: "Kimberling sums" K_n + K_3.

Terms

a(0) =2a(1) =7a(2) =10a(3) =4a(4) =15a(5) =18a(6) =20a(7) =23a(8) =9a(9) =28a(10) =31a(11) =12a(12) =36a(13) =39a(14) =41a(15) =44a(16) =17a(17) =49a(18) =52a(19) =54a(20) =57a(21) =22a(22) =62a(23) =65a(24) =25a(25) =70a(26) =73a(27) =75a(28) =78a(29) =30