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A109474 as a simple table

na(n)
11
23
34
413
514
623
724
833
934
1043
1144
1253
1354
1463
1564
1673
1774
1883
1984
2093
2194
22103
23104
24113
25114
26123
27124
28133
29134
30143
31144
32153
33154
34163
35164
36173
37174
38183
39184
40193
41194
42203
43204
44213
45214
46223
47224
48233
49234
50243
51244
52253
53254
54263
55264
56273
57274
58283
59284

[1,3,4,13,14,23,24,33,34,43,44,53,54,63,64,73,74,
 83,84,93,94,103,104,113,114,123,124,133,134,143,
 144,153,154,163,164,173,174,183,184,193,194,203,
 204,213,214,223,224,233,234,243,244,253,254,263,
 264,273,274,283,284]