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A337973 as a simple table

na(n)
12
24
34
48
56
68
713
810
910
1013
1123
1215
1314
1415
1523
1631
1725
1819
1919
2025
2131
2248
2333
2429
2524
2629
2733
2848
2962
3050
3137
3234
3334
3437
3550
3662
3786
3864
3954
4042
4144
4242
4354
4464
4586
46114
4788
4868
4959
5052
5152
5259
5368
5488
55114
56127
57116
5892
5973
6069
6160
6269
6373
6492
65116
66127

[2,4,4,8,6,8,13,10,10,13,23,15,14,15,23,31,25,19,
 19,25,31,48,33,29,24,29,33,48,62,50,37,34,34,37,
 50,62,86,64,54,42,44,42,54,64,86,114,88,68,59,52,
 52,59,68,88,114,127,116,92,73,69,60,69,73,92,116,
 127]