Second accumulation array of A185780, by antidiagonals.

Terms

a(0) =1a(1) =6a(2) =3a(3) =20a(4) =20a(5) =6a(6) =50a(7) =70a(8) =44a(9) =10a(10) =105a(11) =180a(12) =160a(13) =80a(14) =15a(15) =196a(16) =385a(17) =420a(18) =300a(19) =130a(20) =21a(21) =336a(22) =728a(23) =910a(24) =800a(25) =500a(26) =196a(27) =28a(28) =540a(29) =1260