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A292281 as a simple table

na(n)
01
120
2167
3867
43322
510309
627410
764770
8139479
9278674
10523457
11933725
121594008
132620411
144168756
156444020
169711165
1714307456
1820656363
1929283143
2040832198
2156086305
2275987814
23101661910
24134442035
25175897566
26227863845
27292474657
28372197252
29469870007
30588742824

[1,20,167,867,3322,10309,27410,64770,139479,
 278674,523457,933725,1594008,2620411,4168756,
 6444020,9711165,14307456,20656363,29283143,
 40832198,56086305,75987814,101661910,134442035,
 175897566,227863845,292474657,372197252,469870007,
 588742824]