Denominator of Laguerre(n, 3).

Terms

a(0) =1a(1) =1a(2) =2a(3) =1a(4) =8a(5) =20a(6) =80a(7) =280a(8) =4480a(9) =2240a(10) =44800a(11) =246400a(12) =1971200a(13) =12812800a(14) =358758400a(15) =81536000a(16) =28700672000a(17) =243955712000a(18) =88711168000