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A159970 as a simple table

na(n)
00
13
21
35
44
510
615
79
88
96
1014
1113
1218
1323
1428
152
1611
1719
187
1916
2020
2121
2226
2325
2424
2512
2630
2731
2829
2934
3039
3133
3217
3335
3438
3522
3636
3727
3832
3941
4040
4143
4246
4345
4450
4555
4660
4744
4848
4951
5049
5153
5237
5358
5463
5542
5656
5754
5861
5968
6066
6171
6276
6365
6459
6547
6670
6764

[0,3,1,5,4,10,15,9,8,6,14,13,18,23,28,2,11,19,7,
 16,20,21,26,25,24,12,30,31,29,34,39,33,17,35,38,
 22,36,27,32,41,40,43,46,45,50,55,60,44,48,51,49,
 53,37,58,63,42,56,54,61,68,66,71,76,65,59,47,70,
 64]