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A045546 as a simple table

na(n)
12
23
34
45
56
68
79
810
911
1013
1115
1216
1319
1420
1521
1624
1726
1828
1930
2031
2135
2238
2339
2441
2544
2645
2746
2848
2950
3053
3154
3255
3356
3459
3560
3664
3765
3866
3968
4070
4176
4283
4385
4486
4589
4693
4794
4896
49100
50101
51103
52114
53115
54120
55125
56126
57130
58131
59134
60138
61140

[2,3,4,5,6,8,9,10,11,13,15,16,19,20,21,24,26,28,
 30,31,35,38,39,41,44,45,46,48,50,53,54,55,56,59,
 60,64,65,66,68,70,76,83,85,86,89,93,94,96,100,101,
 103,114,115,120,125,126,130,131,134,138,140]