Denominator of (Sum_{k=1..n} k^3)/n!.

Terms

a(0) =1a(1) =1a(2) =2a(3) =1a(4) =6a(5) =8a(6) =80a(7) =45a(8) =280a(9) =896a(10) =145152a(11) =100800a(12) =13305600a(13) =68428800a(14) =7907328a(15) =90810720a(16) =326918592000a(17) =258306048000