First column of the Zorach additive triangle A035312.

Terms

a(0) =1a(1) =2a(2) =4a(3) =7a(4) =5a(5) =8a(6) =10a(7) =14a(8) =15a(9) =19a(10) =16a(11) =20a(12) =21a(13) =22a(14) =27a(15) =30a(16) =28a(17) =33a(18) =32a(19) =38a(20) =37a(21) =39a(22) =44a(23) =45a(24) =51a(25) =46a(26) =47a(27) =54a(28) =55a(29) =52