Triangular array with the first half of the odd-indexed rows of A048004.

Terms

a(0) =1a(1) =1a(2) =4a(3) =1a(4) =12a(5) =11a(6) =1a(7) =33a(8) =47a(9) =27a(10) =1a(11) =88a(12) =185a(13) =127a(14) =63a(15) =1a(16) =232a(17) =694a(18) =563a(19) =303a(20) =143a(21) =1a(22) =609a(23) =2526a(24) =2400a(25) =1394a(26) =687a(27) =319a(28) =1a(29) =1596