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A117620 as a simple table

na(n)
14
232
34096
4285212672
53536203627938199896064
627735467127437590594631628902073909856749798039036448735232

[4,32,4096,285212672,3536203627938199896064,
 27735467127437590594631628902073909856749798039036\
 448735232]