login

A251580 as a simple table

na(n)
01
11
210
3280
413960
51023760
699935200
712226859200
81801725932800
9310890328768000
1061516405597830400
1113735605457885312000
123416919943285809280000
13937247149729410729472000
14281051240591439955878400000
1591474949907165746668607488000
1632117399444469103248129863680000

[1,1,10,280,13960,1023760,99935200,12226859200,
 1801725932800,310890328768000,61516405597830400,
 13735605457885312000,3416919943285809280000,
 937247149729410729472000,
 281051240591439955878400000,
 91474949907165746668607488000,
 32117399444469103248129863680000]