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A070951 as a simple table

na(n)
00
10
22
31
45
52
68
73
810
97
1010
119
1213
138
1416
159
1618
1716
1817
1915
2020
2120
2222
2319
2423
2524
2627
2722
2827
2925
3030
3124
3239
3328
3440
3525
3641
3731
3839
3934
4034
4142
4240
4338
4451
4536
4651
4744
4853
4946
5058
5144
5253
5347
5460
5546
5656
5755
5861
5950
6060
6153
6266
6349
6465
6575
6668
6766
6868
6972

[0,0,2,1,5,2,8,3,10,7,10,9,13,8,16,9,18,16,17,15,
 20,20,22,19,23,24,27,22,27,25,30,24,39,28,40,25,
 41,31,39,34,34,42,40,38,51,36,51,44,53,46,58,44,
 53,47,60,46,56,55,61,50,60,53,66,49,65,75,68,66,
 68,72]