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A004117 as a simple table

na(n)
01
11
22
314
435
591
6728
71976
85434
9135850
10380380
111071980
129111830
1325933670
1474096200
15637227320
161832028545
175280552865
18137294374490
19397431084050
201152550143745
2110043651252635
2229217894553120
2385112997176480

[1,1,2,14,35,91,728,1976,5434,135850,380380,
 1071980,9111830,25933670,74096200,637227320,
 1832028545,5280552865,137294374490,397431084050,
 1152550143745,10043651252635,29217894553120,
 85112997176480]