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A290990 as a simple table

na(n)
00
11
22
35
412
528
664
7145
8328
9743
101686
113830
128704
1319781
1444950
15102133
16232048
17527208
181197808
192721421
206183108
2114048151
2231917714
2372517738
24164761792
25374342057
26850512458
271932380869
284390407092
299975090996
3022663602720
3151492150953

[0,1,2,5,12,28,64,145,328,743,1686,3830,8704,
 19781,44950,102133,232048,527208,1197808,2721421,
 6183108,14048151,31917714,72517738,164761792,
 374342057,850512458,1932380869,4390407092,
 9975090996,22663602720,51492150953]