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A303675 as a simple table

na(n)
11
26
31
4120
530
61
75040
81680
9126
101
11362880
12151200
1317640
14510
151
1639916800
1719958400
183160080
19168960
202046
211
226227020800
233632428800
24726485760
2557657600
261561560
278190
281
291307674368000
30871782912000
31210680870400
3222313491200
33988107120
3414217840
3532766
361

[1,6,1,120,30,1,5040,1680,126,1,362880,151200,
 17640,510,1,39916800,19958400,3160080,168960,2046,
 1,6227020800,3632428800,726485760,57657600,
 1561560,8190,1,1307674368000,871782912000,
 210680870400,22313491200,988107120,14217840,32766,
 1]