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A012348 as a simple table

na(n)
00
12
28
3368
418048
52068992
6306585600
769776517120
820465184768000
97935055273328640
103823692307188940800
112274500815301011046400
121624840840672099644211200
131378125905023775157056962560

[0,2,8,368,18048,2068992,306585600,69776517120,
 20465184768000,7935055273328640,
 3823692307188940800,2274500815301011046400,
 1624840840672099644211200,
 1378125905023775157056962560]