Triangle read by rows: T(n, k) = [x^k] x*Pochhammer(n + x, n)/(n + x).

Terms

a(0) =1a(1) =3a(2) =1a(3) =20a(4) =9a(5) =1a(6) =210a(7) =107a(8) =18a(9) =1a(10) =3024a(11) =1650a(12) =335a(13) =30a(14) =1a(15) =55440a(16) =31594a(17) =7155a(18) =805a(19) =45a(20) =1a(21) =1235520a(22) =725592a(23) =176554a(24) =22785a(25) =1645a(26) =63a(27) =1a(28) =32432400a(29) =19471500