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A077708 as a simple table

na(n)
18
248
3384
413824
5304128
681810432
731415205888
811340889325568
930246151831289856
1015062583611982348288
11118482282691853151633408
121014326822124954831133605888
1310512483184503031869868691423232

[8,48,384,13824,304128,81810432,31415205888,
 11340889325568,30246151831289856,
 15062583611982348288,118482282691853151633408,
 1014326822124954831133605888,
 10512483184503031869868691423232]