Leading diagonal of triangle in A222310.

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =5a(5) =15a(6) =105a(7) =70a(8) =1a(9) =5a(10) =33a(11) =55a(12) =65a(13) =273a(14) =1001a(15) =1430a(16) =17a(17) =17a(18) =969a(19) =4845a(20) =1785a(21) =6545a(22) =37145a(23) =81719a(24) =17a(25) =1105a(26) =3553a(27) =969969a(28) =672945a(29) =81345