Triangle read by rows: T(n, k) = binomial(n, k) * Pochhammer(n, k).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =4a(5) =6a(6) =1a(7) =9a(8) =36a(9) =60a(10) =1a(11) =16a(12) =120a(13) =480a(14) =840a(15) =1a(16) =25a(17) =300a(18) =2100a(19) =8400a(20) =15120a(21) =1a(22) =36a(23) =630a(24) =6720a(25) =45360a(26) =181440a(27) =332640a(28) =1a(29) =49