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A298640 as a simple table

na(n)
01
10
21
31
42
58
612
7129
8874
99630
10167001
113043147
1272844510
132423789655
14106665874384
156156805673648
16470151743582651
1747558937432498729
186363358599941131580
191126147544855148769425
20263646401550138303553708
2181649922556593759124887197

[1,0,1,1,2,8,12,129,874,9630,167001,3043147,
 72844510,2423789655,106665874384,6156805673648,
 470151743582651,47558937432498729,
 6363358599941131580,1126147544855148769425,
 263646401550138303553708,
 81649922556593759124887197]