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A218297 as a simple table

na(n)
01
11
216
3732
467072
510356120
62428502016
7806564304896
8360766703665152
9209198209220565120
10152649491877210357760
11136856491451984089032192
12147838797016098042267303936
13189330891572377497747235278848
14283553443348816020717858371665920

[1,1,16,732,67072,10356120,2428502016,
 806564304896,360766703665152,209198209220565120,
 152649491877210357760,136856491451984089032192,
 147838797016098042267303936,
 189330891572377497747235278848,
 283553443348816020717858371665920]