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A369851 as a simple table

na(n)
10
20
31
44
510
620
736
865
9129
10285
11661
121521
133394
147359
1515706
1633457
1771760
18155248
19337745
20735723
211600062
223471298
237517368
2416269333
2535221440
2676302420
27165392856
28358594516
29777451793
301685254125
313652428851
327915135727
3317152718719
3437172960128

[0,0,1,4,10,20,36,65,129,285,661,1521,3394,7359,
 15706,33457,71760,155248,337745,735723,1600062,
 3471298,7517368,16269333,35221440,76302420,
 165392856,358594516,777451793,1685254125,
 3652428851,7915135727,17152718719,37172960128]