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A115597 as a simple table

na(n)
21
31
42
51
63
76
81
94
1016
1112
121
135
1431
1584
1634
171
186
1952
20318
21579
2287
231
247
2581
26867
275366
285721
29302
301
318
32118
332028
3428722
35155291
3687381
371118
381
399
40165
414251
42115391
431919895
447855628
452104349
465478

[1,1,2,1,3,6,1,4,16,12,1,5,31,84,34,1,6,52,318,
 579,87,1,7,81,867,5366,5721,302,1,8,118,2028,
 28722,155291,87381,1118,1,9,165,4251,115391,
 1919895,7855628,2104349,5478]