A triangle of numbers related to triangle A049325.

Terms

a(0) =1a(1) =3a(2) =1a(3) =6a(4) =9a(5) =1a(6) =6a(7) =51a(8) =18a(9) =1a(10) =0a(11) =210a(12) =195a(13) =30a(14) =1a(15) =0a(16) =630a(17) =1575a(18) =525a(19) =45a(20) =1a(21) =0a(22) =1260a(23) =10080a(24) =6825a(25) =1155a(26) =63a(27) =1a(28) =0a(29) =1260