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A208666 as a simple table

na(n)
10
21
34
414
544
6152
7514
81866
96884
1026137
11100442
12390592
131526272
145989223
1523548688
1692727898
17365445200
181441195226
195686268314
2022444465311
2188622259788
22350040069245
231383007946774
245465854718664
2521607909105528
2685444555330132
27337962745845558
281337094537703089

[0,1,4,14,44,152,514,1866,6884,26137,100442,
 390592,1526272,5989223,23548688,92727898,
 365445200,1441195226,5686268314,22444465311,
 88622259788,350040069245,1383007946774,
 5465854718664,21607909105528,85444555330132,
 337962745845558,1337094537703089]