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A181851 as a simple table

na(n)
11
22
31
43
54
61
74
88
96
101
115
1220
1315
148
151
166
1721
1850
1924
2010
211
227
2356
2466
2596
2635
2712
281
298
3060
31180
32160
33160
3448
3514
361
379
3896
39264
40432
41325
42244
4363
4416
451
4610
47105
48510
49776
50892
51585
52350
5380
5418
551
5611
57220
58567
591704
601835
611668
62966
63480
6499
6520
661

[1,2,1,3,4,1,4,8,6,1,5,20,15,8,1,6,21,50,24,10,1,
 7,56,66,96,35,12,1,8,60,180,160,160,48,14,1,9,96,
 264,432,325,244,63,16,1,10,105,510,776,892,585,
 350,80,18,1,11,220,567,1704,1835,1668,966,480,99,
 20,1]