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A303765 as a simple table

na(n)
00
11
23
32
47
54
65
715
88
99
1011
1110
1231
1316
1417
1519
1618
1723
186
1963
2032
2133
2235
2334
2439
2536
2637
2747
2812
2913
30127
3164
3265
3367
3466
3571
3668
3769
3879
3914
40255
41128
42129
43131
44130
45135
46132
47133
48143
49136
50137
51139
52138
53159
5420
5521
56511
57256
58257
59259
60258
61263
62260
63261
64271
65264
66265
67267
68266
69287
7024
7125
7227
7326
741023
75512
76513
77515
78514
79519
80516
81517
82527

[0,1,3,2,7,4,5,15,8,9,11,10,31,16,17,19,18,23,6,
 63,32,33,35,34,39,36,37,47,12,13,127,64,65,67,66,
 71,68,69,79,14,255,128,129,131,130,135,132,133,
 143,136,137,139,138,159,20,21,511,256,257,259,258,
 263,260,261,271,264,265,267,266,287,24,25,27,26,
 1023,512,513,515,514,519,516,517,527]