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A000931 as a simple table

na(n)
01
10
20
31
40
51
61
71
82
92
103
114
125
137
149
1512
1616
1721
1828
1937
2049
2165
2286
23114
24151
25200
26265
27351
28465
29616
30816
311081
321432
331897
342513
353329
364410
375842
387739
3910252
4013581
4117991
4223833
4331572
4441824
4555405
4673396
4797229
48128801
49170625

[1,0,0,1,0,1,1,1,2,2,3,4,5,7,9,12,16,21,28,37,49,
 65,86,114,151,200,265,351,465,616,816,1081,1432,
 1897,2513,3329,4410,5842,7739,10252,13581,17991,
 23833,31572,41824,55405,73396,97229,128801,170625]