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A023826 as a simple table

na(n)
12
23
34
45
57
66
79
89
910
1010
119
129
1313
1414
1514
1614
1715
1815
1915
2016
2119
2216
2319
2418
2521
2620
2718
2819
2921
3021
3122
3222
3323
3425
3524
3624
3727
3826
3928
4026
4130
4228
4328
4429
4528
4628
4730
4830
4931
5031
5131
5231
5335
5430
5531
5631
5732
5834
5933
6033
6138
6239
6339
6437
6539
6638
6739
6840
6943
7040
7141
7241
7344
7444
7543
7644
7746
7845

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