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A012341 as a simple table

na(n)
00
12
28
3248
411328
51091232
6148080000
730317577600
88228536780800
92957031184028160
101336782441018009600
11749500660718368634880
12508063303148296391147520
13410659058984740631962951680

[0,2,8,248,11328,1091232,148080000,30317577600,
 8228536780800,2957031184028160,
 1336782441018009600,749500660718368634880,
 508063303148296391147520,
 410659058984740631962951680]