Triangle read by rows: minimum inversion terminator in rooted labeled trees.

Terms

a(0) =1a(1) =2a(2) =1a(3) =6a(4) =8a(5) =2a(6) =24a(7) =75a(8) =20a(9) =6a(10) =120a(11) =864a(12) =216a(13) =72a(14) =24a(15) =720a(16) =12005a(17) =2744a(18) =882a(19) =336a(20) =120a(21) =5040a(22) =196608a(23) =40960a(24) =12288a(25) =4608a(26) =1920a(27) =720a(28) =40320a(29) =3720087