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A089851 as a simple table

na(n)
00
11
22
33
45
56
64
77
88
912
1013
1115
1216
1319
1411
1514
169
1717
1818
1910
2020
2121
2222
2331
2432
2534
2635
2736
2840
2941
3043
3144
3247
3352
3453
3556
3660
3730
3833
3939
4042
4151
4228
4337
4423
4545
4646
4724
4848
4949
5050
5129
5238
5325
5454
5555
5626
5757
5858
5959
6027
6161
6262
6363
6464
6587
6688
6790
6891
6992
7096
7197
7299

[0,1,2,3,5,6,4,7,8,12,13,15,16,19,11,14,9,17,18,
 10,20,21,22,31,32,34,35,36,40,41,43,44,47,52,53,
 56,60,30,33,39,42,51,28,37,23,45,46,24,48,49,50,
 29,38,25,54,55,26,57,58,59,27,61,62,63,64,87,88,
 90,91,92,96,97,99]