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A054718 as a simple table

na(n)
01
13
26
324
472
5240
6696
72184
86480
919656
1058800
11177144
12530640
131594320
144780776
1514348640
1643040160
17129140160
18387400104
191162261464
203486725280
2110460350992
2231380882456
2394143178824
24282428998560
25847288609200
262541864234000
277625597465304

[1,3,6,24,72,240,696,2184,6480,19656,58800,177144,
 530640,1594320,4780776,14348640,43040160,
 129140160,387400104,1162261464,3486725280,
 10460350992,31380882456,94143178824,282428998560,
 847288609200,2541864234000,7625597465304]