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A033463 as a simple table

na(n)
01
18
250
3248
41048
53952
613696
744480
8137216
9406016
101160704
113223552
128734720
1323171072
1460342272
15154615808
16390529024
17973864960
182400845824
195857869824
2014159446016
2133935065088
2280698408960
23190534647808
24446911479808
251041898668032
262415348678656
275570035712000

[1,8,50,248,1048,3952,13696,44480,137216,406016,
 1160704,3223552,8734720,23171072,60342272,
 154615808,390529024,973864960,2400845824,
 5857869824,14159446016,33935065088,80698408960,
 190534647808,446911479808,1041898668032,
 2415348678656,5570035712000]