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A217278 as a simple table

na(n)
00
10
21
33
410
515
645
7120
8351
9528
101540
114095
1211935
1317955
1452326
15139128
16405450
17609960
181777555
194726275
2013773376
2120720703
2260384555
23160554240
24467889345
25703893960
262051297326
275454117903
2815894464365
2923911673955
3069683724540
31185279454480

[0,0,1,3,10,15,45,120,351,528,1540,4095,11935,
 17955,52326,139128,405450,609960,1777555,4726275,
 13773376,20720703,60384555,160554240,467889345,
 703893960,2051297326,5454117903,15894464365,
 23911673955,69683724540,185279454480]