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A243500 as a simple table

na(n)
12
21
34
43
56
65
78
87
910
109
1122
1227
1320
1415
1514
1633
1718
1817
1928
2013
2134
2211
2362
2429
2526
2625
2712
2819
2924
3075
3168
3243
3316
3421
3546
3669
37118
3845
3982
40243
41142
4299
4332
4463
4538
4635
4778
48171
4950
5049
5152
5251
53116
54275
5574
56147
57122
5881
5960
6059
6188
6223
6344
64201
6566
6665
6798
6831
6936

[2,1,4,3,6,5,8,7,10,9,22,27,20,15,14,33,18,17,28,
 13,34,11,62,29,26,25,12,19,24,75,68,43,16,21,46,
 69,118,45,82,243,142,99,32,63,38,35,78,171,50,49,
 52,51,116,275,74,147,122,81,60,59,88,23,44,201,66,
 65,98,31,36]