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A129137 as a simple table

na(n)
10
20
31
45
537
6366
74553
868408
91206405
1024447440
11560041201
1214315792256
13404057805989
1412482986261760
15419042630871225
1615189786100468736
17591374264243364037
1824612549706061862912
191090556290466098198625

[0,0,1,5,37,366,4553,68408,1206405,24447440,
 560041201,14315792256,404057805989,12482986261760,
 419042630871225,15189786100468736,
 591374264243364037,24612549706061862912,
 1090556290466098198625]