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A249631 as a simple table

na(n)
22
32
46
52
612
724
82
920
1072
11120
122
1334
14180
15480
16720
172
1856
19428
201632
213600
225040
232
2488
251042
265124
2715600
2830240
2940320
302
31136
322512
3315860
3461872
35159840
36282240
37362880
382
39208
405912
4150186
42236388
43773040
441764000
452903040
463628800

[2,2,6,2,12,24,2,20,72,120,2,34,180,480,720,2,56,
 428,1632,3600,5040,2,88,1042,5124,15600,30240,
 40320,2,136,2512,15860,61872,159840,282240,362880,
 2,208,5912,50186,236388,773040,1764000,2903040,
 3628800]