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A221195 as a simple table

na(n)
01
13
21
396
41
5483
61
79600
81
947523
101
11940896
121
134656963
141
1592198400
161
17456335043
181
199034502496
201
2144716177443
221
23885289046400
241
254381729054563
261
2786749292044896
281
29429364731169923
301
318500545331353600
321

[1,3,1,96,1,483,1,9600,1,47523,1,940896,1,4656963,
 1,92198400,1,456335043,1,9034502496,1,44716177443,
 1,885289046400,1,4381729054563,1,86749292044896,1,
 429364731169923,1,8500545331353600,1]