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A323717 as a simple table

na(n)
02
14
236
34704
423400000
57778123781120
6245221791787632844800
7980866487456532919096049664000
8647456833933936977045736601678008811520000
989423837415458106416291101560480526982914768896000000000

[2,4,36,4704,23400000,7778123781120,
 245221791787632844800,
 980866487456532919096049664000,
 647456833933936977045736601678008811520000,
 89423837415458106416291101560480526982914768896000\
 000000]