Triangle formed by right-bounded rhombus rule, read by rows.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =1a(7) =3a(8) =7a(9) =6a(10) =1a(11) =4a(12) =12a(13) =18a(14) =16a(15) =1a(16) =5a(17) =18a(18) =37a(19) =53a(20) =40a(21) =1a(22) =6a(23) =25a(24) =64a(25) =120a(26) =148a(27) =109a(28) =1a(29) =7