login

A337303 as a simple table

na(n)
01
11
20
30
496
5480
657600
7403200
8191600640
91724405760
101597368729600
1117571056025600
1228378507272192000
13368920594538496000
14952903592436341145600
1514293553886545117184000
1655442575636536644075520000
17942523785821122949283840000
185231730206388249282710863872000

[1,1,0,0,96,480,57600,403200,191600640,1724405760,
 1597368729600,17571056025600,28378507272192000,
 368920594538496000,952903592436341145600,
 14293553886545117184000,
 55442575636536644075520000,
 942523785821122949283840000,
 5231730206388249282710863872000]