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A292341 as a simple table

na(n)
21
316
4232
53328
647957
7696304
810187288
9150087168
102224889247
1133160970672
12496608054904
137468314975488
14112731489535747
151707278435651920
1625932766975385096
17394956591009678336
186029683178394959854
1992254556123206383072

[1,16,232,3328,47957,696304,10187288,150087168,
 2224889247,33160970672,496608054904,7468314975488,
 112731489535747,1707278435651920,
 25932766975385096,394956591009678336,
 6029683178394959854,92254556123206383072]