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A028676 as a simple table

na(n)
01
1182
26956040
352356666223680
477265383687862143155200
522349330345043106156640015717990400
61267070807948330368930015476714098504169160704000

[1,182,6956040,52356666223680,
 77265383687862143155200,
 22349330345043106156640015717990400,
 1267070807948330368930015476714098504169160704000]