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A326887 as a simple table

na(n)
01
12
28
348
4364
53320
635464
7433692
85962548
990931152
101522657264
1127765229844
12547487475484
1311604952395816
14263091290017560
156351255101776812
16162643987129698628
174403250400372110656
18125649232950852714496
193769013390615951560068
20118555772298034094231724

[1,2,8,48,364,3320,35464,433692,5962548,90931152,
 1522657264,27765229844,547487475484,
 11604952395816,263091290017560,6351255101776812,
 162643987129698628,4403250400372110656,
 125649232950852714496,3769013390615951560068,
 118555772298034094231724]