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A291885 as a simple table

na(n)
01
11
25
331
4252
52117
618546
7164229
81469596
913229876
10119712521
111087573357
129914033252
1390633332870
14830621140260
157628813061585
1670200092854044
17647070588612140
185973385906039684
1955217660246861884
20511054426374819184
214735208302827742549

[1,1,5,31,252,2117,18546,164229,1469596,13229876,
 119712521,1087573357,9914033252,90633332870,
 830621140260,7628813061585,70200092854044,
 647070588612140,5973385906039684,
 55217660246861884,511054426374819184,
 4735208302827742549]