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A343274 as a simple table

na(n)
10
28
381
4520
515625
6233369
75764801
833554952
91162261548
1070000015633
113138428376721
1244580502475161
133937376385699289
14100008061435786953
153503151123046890706
1636893488147452658184
1714063084452067724991009
18196732040376483850371956
1937589973457545958193355601

[0,8,81,520,15625,233369,5764801,33554952,
 1162261548,70000015633,3138428376721,
 44580502475161,3937376385699289,
 100008061435786953,3503151123046890706,
 36893488147452658184,14063084452067724991009,
 196732040376483850371956,
 37589973457545958193355601]