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A121216 as a simple table

na(n)
11
22
33
45
54
66
77
811
98
109
1113
1210
1312
1417
1519
1614
1715
1823
1916
2018
2121
2225
2320
2422
2527
2629
2726
2824
2931
3035
3128
3232
3333
3437
3534
3630
3739
3841
3938
4036
4143
4247
4340
4442
4549
4653
4744
4845
4951
5046
5150
5255
5357
5448
5552
5659
5761
5854
5956
6065
6167
6258
6360
6463
6571
6662
6764
6869
6973
7068
7166
7275

[1,2,3,5,4,6,7,11,8,9,13,10,12,17,19,14,15,23,16,
 18,21,25,20,22,27,29,26,24,31,35,28,32,33,37,34,
 30,39,41,38,36,43,47,40,42,49,53,44,45,51,46,50,
 55,57,48,52,59,61,54,56,65,67,58,60,63,71,62,64,
 69,73,68,66,75]