Denominator of Laguerre(n, 1).

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =15a(6) =144a(7) =420a(8) =5760a(9) =4536a(10) =403200a(11) =1995840a(12) =6220800a(13) =259459200a(14) =1341204480a(15) =46702656000