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A156303 as a simple table

na(n)
01
11
24
38
420
538
688
7162
8336
9624
101211
112195
124109
137295
1413190
1523072
1640618
1769838
18120486
19204006
20345595
21577387
22962961
231588483
242613930
254262138
266928799
2711179251
2817976330
2928720552
3045729595
3172401921
32114239033

[1,1,4,8,20,38,88,162,336,624,1211,2195,4109,7295,
 13190,23072,40618,69838,120486,204006,345595,
 577387,962961,1588483,2613930,4262138,6928799,
 11179251,17976330,28720552,45729595,72401921,
 114239033]