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A371974 as a simple table

na(n)
00
11
23
32
47
54
66
75
815
910
1012
119
1214
1311
1413
158
1631
1720
1826
1917
2028
2123
2225
2318
2430
2521
2627
2716
2829
2922
3024
3119
3263
3346
3452
3537
3658
3743
3849
3932
4060
4145
4255
4338
4457
4540
4650
4735
4862
4947
5053
5136
5259
5342
5448
5533
5661
5744
5854
5939
6056
6141
6251
6334
64127
6588
66110

[0,1,3,2,7,4,6,5,15,10,12,9,14,11,13,8,31,20,26,
 17,28,23,25,18,30,21,27,16,29,22,24,19,63,46,52,
 37,58,43,49,32,60,45,55,38,57,40,50,35,62,47,53,
 36,59,42,48,33,61,44,54,39,56,41,51,34,127,88,110]