Kim-sums: "Kimberling sums" K_n + K_7.

Terms

a(0) =6a(1) =18a(2) =21a(3) =23a(4) =26a(5) =29a(6) =31a(7) =34a(8) =36a(9) =39a(10) =42a(11) =44a(12) =47a(13) =50a(14) =52a(15) =55a(16) =57a(17) =60a(18) =63a(19) =65a(20) =68a(21) =70a(22) =73a(23) =76a(24) =78a(25) =81a(26) =84a(27) =86a(28) =89a(29) =91