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A105749 as a simple table

na(n)
01
12
214
3222
46384
5291720
619445040
71781750880
8214899027840
933007837322880
106290830003852800
111456812592995513600
12402910665227270323200
13131173228963370155161600
1449656810289225281849907200
1521628258853895305337293568000
1610739534026001485514941587456000

[1,2,14,222,6384,291720,19445040,1781750880,
 214899027840,33007837322880,6290830003852800,
 1456812592995513600,402910665227270323200,
 131173228963370155161600,
 49656810289225281849907200,
 21628258853895305337293568000,
 10739534026001485514941587456000]