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A131514 as a simple table

na(n)
11
21
31
415
51
671
71
8280
915
1071
111
123660
131
1471
1571
165775
171
183660
191
203660
2171
2271
231
24160440
2515
2671
27280
283660
291
3020365
311
32126126
3371
3471
3571
36415185
371
3871
3971
40160440
411
4220365
431
443660
453660
4671
471
486387150
4915
503660
5171
523660
531
54160440
5571
56160440

[1,1,1,15,1,71,1,280,15,71,1,3660,1,71,71,5775,1,
 3660,1,3660,71,71,1,160440,15,71,280,3660,1,20365,
 1,126126,71,71,71,415185,1,71,71,160440,1,20365,1,
 3660,3660,71,1,6387150,15,3660,71,3660,1,160440,
 71,160440]