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A167995 as a simple table

na(n)
11
21
33
410
544
6238
71506
810960
990449
10834166
118496388
1294738095
131148207875
1415031585103
15211388932628

[1,1,3,10,44,238,1506,10960,90449,834166,8496388,
 94738095,1148207875,15031585103,211388932628]