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A048505 as a simple table

na(n)
01
12
21
37
45
51
625
718
810
91
1081
1156
1235
1317
141
15241
16160
17101
1858
1926
201
21673
22432
23269
24160
2587
2637
271
281793
291120
30685
31408
32233
33122
3450
351
364609
372816
381693
391000
40577
41320
42163
4365
441
4511521
466912
474093
482392
491377
50776
51421

[1,2,1,7,5,1,25,18,10,1,81,56,35,17,1,241,160,101,
 58,26,1,673,432,269,160,87,37,1,1793,1120,685,408,
 233,122,50,1,4609,2816,1693,1000,577,320,163,65,1,
 11521,6912,4093,2392,1377,776,421]