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A298012 as a simple table

na(n)
00
10
21
31
44
516
685
7533
83888
932268
10300193
113093377
1234970468
13430293488
145724411845
1581871668773
161252691817856
1720417647146396
18353169795861921
196461418976274657
20124664729763630436

[0,0,1,1,4,16,85,533,3888,32268,300193,3093377,
 34970468,430293488,5724411845,81871668773,
 1252691817856,20417647146396,353169795861921,
 6461418976274657,124664729763630436]