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A211530 as a simple table

na(n)
18
222
356
4124
5270
6560
71156
82336
94714
109418
1118812
1237400
1374374
14147596
15293042
16581384
171154070
182290670
194549186
209036466
2117959458
2235705544
2371021240
24141319688
25281322224
26560223850
271116045988
282224048908
294433497296

[8,22,56,124,270,560,1156,2336,4714,9418,18812,
 37400,74374,147596,293042,581384,1154070,2290670,
 4549186,9036466,17959458,35705544,71021240,
 141319688,281322224,560223850,1116045988,
 2224048908,4433497296]