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A331270 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
1111
1212
1313
1414
1515
1612
1716
1817
1918
2019
2120
2213
2321
2422
2523
2614
2724
2825
2926
3027
3123
3215
3328
3429
3530
3631
3716
3824
3932
4033
4134
4217
4335
4436
4525
4637
4738
4818
4934
5039
5140
5226
5341
5419
5542
5643
5735
5844
5927
6045
6146
6247
6336
6428
6548
6649
6745

[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,12,16,17,18,
 19,20,13,21,22,23,14,24,25,26,27,23,15,28,29,30,
 31,16,24,32,33,34,17,35,36,25,37,38,18,34,39,40,
 26,41,19,42,43,35,44,27,45,46,47,36,28,48,49,45]