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A153901 as a simple table

na(n)
01
12
21
31
43
52
62
77
83
96
1015
1112
1217
1363
1447
1586
16272
17269
18423
192020
201609
213902
2214951
2318193
2436083
25200112
26201396
27575152
282652677
293907855
309200561

[1,2,1,1,3,2,2,7,3,6,15,12,17,63,47,86,272,269,
 423,2020,1609,3902,14951,18193,36083,200112,
 201396,575152,2652677,3907855,9200561]