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A218305 as a simple table

na(n)
01
11
28
3148
44256
5166816
68297600
7500730112
835547379712
92902899914752
10268094176428032
1127629598827044864
123143573312615481344
13391375817676973932544
1452926434374336385122304
157725597721066205089890304
161210677595048894480252928000

[1,1,8,148,4256,166816,8297600,500730112,
 35547379712,2902899914752,268094176428032,
 27629598827044864,3143573312615481344,
 391375817676973932544,52926434374336385122304,
 7725597721066205089890304,
 1210677595048894480252928000]