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A000990 as a simple table

na(n)
01
11
23
35
410
516
629
745
875
9115
10181
11271
12413
13605
14895
151291
161866
172648
183760
195260
207352
2110160
2214008
2319140
2426085
2535277
2647575
2763753
2885175
29113175
30149938
31197686
32259891
33340225
34444135
35577593
36749131
37968281
381248320
391604340
402056809
412629357
423353404

[1,1,3,5,10,16,29,45,75,115,181,271,413,605,895,
 1291,1866,2648,3760,5260,7352,10160,14008,19140,
 26085,35277,47575,63753,85175,113175,149938,
 197686,259891,340225,444135,577593,749131,968281,
 1248320,1604340,2056809,2629357,3353404]