Ordered differences of factorials.

Terms

a(0) =1a(1) =5a(2) =4a(3) =23a(4) =22a(5) =18a(6) =119a(7) =118a(8) =114a(9) =96a(10) =719a(11) =718a(12) =714a(13) =696a(14) =600a(15) =5039a(16) =5038a(17) =5034a(18) =5016a(19) =4920a(20) =4320a(21) =40319a(22) =40318a(23) =40314a(24) =40296a(25) =40200a(26) =39600a(27) =35280a(28) =362879a(29) =362878