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A184291 as a simple table

na(n)
16
221
321
476
5351
676
7336
87826
97826
10336
111560
12210456
131119936
14210456
151560
167826
176047412
18181402676
19181402676
206047412
217826
2239996
23181410426
2431345666736
25176319685116
2631345666736
27181410426
2839996
29210126
305597460306

[6,21,21,76,351,76,336,7826,7826,336,1560,210456,
 1119936,210456,1560,7826,6047412,181402676,
 181402676,6047412,7826,39996,181410426,
 31345666736,176319685116,31345666736,181410426,
 39996,210126,5597460306]