Triangle in A071946 with rows reversed.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =1a(6) =6a(7) =6a(8) =4a(9) =1a(10) =19a(11) =19a(12) =13a(13) =6a(14) =1a(15) =63a(16) =63a(17) =44a(18) =23a(19) =8a(20) =1a(21) =219a(22) =219a(23) =156a(24) =87a(25) =37a(26) =10a(27) =1a(28) =787a(29) =787