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A141146 as a simple table

na(n)
10
22
314
496
5664
64660
733144
8238448
91732112
1012685428
1193552700
12694072720
135176136640
1438777105120
15291661779920
162201518518240
1716670124621472
18126586920736564
19963723103197516
207354034055776864
2156236603567496720

[0,2,14,96,664,4660,33144,238448,1732112,12685428,
 93552700,694072720,5176136640,38777105120,
 291661779920,2201518518240,16670124621472,
 126586920736564,963723103197516,7354034055776864,
 56236603567496720]