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A308448 as a simple table

na(n)
11
21
33
46
514
628
764
8135
9300
10653
111458
123223
137240
1416228
1536678
1683025
17188910
18430730
19985752
202260866
215199612
2211982591
2327673826
2464027215
25148399514
26344490100
27800886300
281864461210
294346031950
3010142519585
3123696421808
3255420499295
33129742683174
34304014091125

[1,1,3,6,14,28,64,135,300,653,1458,3223,7240,
 16228,36678,83025,188910,430730,985752,2260866,
 5199612,11982591,27673826,64027215,148399514,
 344490100,800886300,1864461210,4346031950,
 10142519585,23696421808,55420499295,129742683174,
 304014091125]