Denominator of Laguerre(n, 4).

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =1a(5) =15a(6) =45a(7) =35a(8) =315a(9) =2835a(10) =675a(11) =155925a(12) =467775a(13) =2027025a(14) =42567525a(15) =638512875a(16) =70945875a(17) =1550674125a(18) =7514805375a(19) =618718975875