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A212943 as a simple table

na(n)
11
21
31
41
57
61
71
8181
937
101
111
1210311
139019
14175
151
161
171016501
186470341
19331489
20781
211
221
23152747323
2410058484751
252509306671
2610669771
273367
281
291
3032383630189
3128744943858947
3252311221188001
33801439905901
34320396041
3514197
361
371

[1,1,1,1,7,1,1,181,37,1,1,10311,9019,175,1,1,
 1016501,6470341,331489,781,1,1,152747323,
 10058484751,2509306671,10669771,3367,1,1,
 32383630189,28744943858947,52311221188001,
 801439905901,320396041,14197,1,1]