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A222783 as a simple table

na(n)
13960
2213840
349904176
42293746012
5279998448898
612671662224780
71117919582690144
851006951713167704

[3960,213840,49904176,2293746012,279998448898,
 12671662224780,1117919582690144,51006951713167704]