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A208706 as a simple table

na(n)
116
2356
38128
4185344
54226368
696373248
72197585152
850111214592
91142678737920
1026056337063936
11594158864306176
1213548518165364736
13308944889161203712
147044825373067575296
15160642128347753938944

[16,356,8128,185344,4226368,96373248,2197585152,
 50111214592,1142678737920,26056337063936,
 594158864306176,13548518165364736,
 308944889161203712,7044825373067575296,
 160642128347753938944]