Triangle read by rows: row n lists the first n positive integers in decreasing order.

Terms

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