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A156708 as a simple table

na(n)
01
12
21
34
44
51
68
711
85
91
1016
1126
1216
136
141
1532
1657
1742
1822
197
201
2164
22120
2399
2464
2529
268
271
28128
29247
30219
31163
3293
3337
349
351
36256
37502
38466
39382
40256
41130
4246
4310
441
45512
461013
47968
48848
49638
50386
51176
5256
5311
541

[1,2,1,4,4,1,8,11,5,1,16,26,16,6,1,32,57,42,22,7,
 1,64,120,99,64,29,8,1,128,247,219,163,93,37,9,1,
 256,502,466,382,256,130,46,10,1,512,1013,968,848,
 638,386,176,56,11,1]