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A161881 as a simple table

na(n)
01
11
22
38
446
5333
62822
726884
8280778
93162129
1037962174
11481796692
126424120440
1389561323131
141300606338522
1519614272779492
16306422062160964
174948682216714809
1882474329755007710
191416291364674413764
2025027636488359996744
21454585893218323184316

[1,1,2,8,46,333,2822,26884,280778,3162129,
 37962174,481796692,6424120440,89561323131,
 1300606338522,19614272779492,306422062160964,
 4948682216714809,82474329755007710,
 1416291364674413764,25027636488359996744,
 454585893218323184316]