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A301480 as a simple table

na(n)
11
21
32
44
58
615
730
854
9103
10186
11345
12606
131115
141936
153466
166046
1710630
1818257
1931927
2054393
2193894
22159631
23272155
24458891
25779375
261305801
272196009
283667242
296130066
3010170745
3116923127
3227942148
3346211977
3476039205
35125094369
36204952168
37335924597

[1,1,2,4,8,15,30,54,103,186,345,606,1115,1936,
 3466,6046,10630,18257,31927,54393,93894,159631,
 272155,458891,779375,1305801,2196009,3667242,
 6130066,10170745,16923127,27942148,46211977,
 76039205,125094369,204952168,335924597]