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A246786 as a simple table

na(n)
11
22
33
44
55
66
77
88
910
1011
1112
1213
1314
1415
1517
1618
1719
1821
1923
2025
2126
2227
2328
2429
2530
2632
2733
2835
2936
3037
3138
3239
3340
3441
3542
3643
3744
3845
3947
4048
4150
4251
4352
4453
4555
4656
4757
4858
4960
5061
5162
5263
5364

[1,2,3,4,5,6,7,8,10,11,12,13,14,15,17,18,19,21,23,
 25,26,27,28,29,30,32,33,35,36,37,38,39,40,41,42,
 43,44,45,47,48,50,51,52,53,55,56,57,58,60,61,62,
 63,64]