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A189418 as a simple table

na(n)
10
21
36
422
566
6151
7312
8564
9984
101601
112478
123622
135242
147271
159856
1613124
1717296
1822229
1928286
2035306
2143850
2253891
2365520
2478624
2594272
26111977
27131990
28154514
29180290
30208611
31240840
32276032
33315720
34359497
35407470
36460078
37519018
38582447
39651232
40725820
41808416

[0,1,6,22,66,151,312,564,984,1601,2478,3622,5242,
 7271,9856,13124,17296,22229,28286,35306,43850,
 53891,65520,78624,94272,111977,131990,154514,
 180290,208611,240840,276032,315720,359497,407470,
 460078,519018,582447,651232,725820,808416]