The array described in A059513 read by antidiagonals in the 'up' direction.

Terms

a(0) =1a(1) =1a(2) =2a(3) =6a(4) =4a(5) =1a(6) =1a(7) =13a(8) =19a(9) =23a(10) =116a(11) =107a(12) =87a(13) =48a(14) =1a(15) =1a(16) =243a(17) =458a(18) =635a(19) =708a(20) =736a(21) =5659a(22) =5533a(23) =5163a(24) =4239a(25) =2967a(26) =1517a(27) =1a(28) =1a(29) =11562