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A007998 as a simple table

na(n)
11
22
33
43
54
65
75
87
98
109
119
1215
1311
1417
1517
1618
1718
1831
1921
2033
2130
2233
2330
2453
2534
2648
2746
2853
2943
3087
3147
3273
3369
3479
3566
36110
3765
38100
3994
40111
4180
42159
4386
44135
45130
46135
47108
48202
49116
50181
51153
52175
53133
54255
55150
56212

[1,2,3,3,4,5,5,7,8,9,9,15,11,17,17,18,18,31,21,33,
 30,33,30,53,34,48,46,53,43,87,47,73,69,79,66,110,
 65,100,94,111,80,159,86,135,130,135,108,202,116,
 181,153,175,133,255,150,212]