Numbers in (2,1)-Pascal triangle (by row).

Terms

a(0) =1a(1) =2a(2) =1a(3) =2a(4) =3a(5) =1a(6) =2a(7) =5a(8) =4a(9) =1a(10) =2a(11) =7a(12) =9a(13) =5a(14) =1a(15) =2a(16) =9a(17) =16a(18) =14a(19) =6a(20) =1a(21) =2a(22) =11a(23) =25a(24) =30a(25) =20a(26) =7a(27) =1a(28) =2a(29) =13