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A222915 as a simple table

na(n)
16
2136
32952
462336
51309863
627663713
7590514107
812759661261
9278866376604
106155545744454
11137016855340060
123071168910680644
1369236193887795927
141568315505284861894
1535666332338351971086
16813825644002258220522

[6,136,2952,62336,1309863,27663713,590514107,
 12759661261,278866376604,6155545744454,
 137016855340060,3071168910680644,
 69236193887795927,1568315505284861894,
 35666332338351971086,813825644002258220522]