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A071192 as a simple table

na(n)
12
24
34
45
56
67
79
89
911
1011
1114
1214
1314
1417
1517
1618
1721
1821
1921
2021
2123
2223
2325
2427
2527
2627
2733
2833
2933
3033
3133
3236
3337
3437
3537
3642
3738
3841
3941
4042
4146
4246
4346
4446
4546
4647
4749
4854
4950
5051
5152
5254
5355
5463
5559
5663
5759
5859
5962
6063
6162
6263
6365

[2,4,4,5,6,7,9,9,11,11,14,14,14,17,17,18,21,21,21,
 21,23,23,25,27,27,27,33,33,33,33,33,36,37,37,37,
 42,38,41,41,42,46,46,46,46,46,47,49,54,50,51,52,
 54,55,63,59,63,59,59,62,63,62,63,65]