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A064651 as a simple table

na(n)
00
11
21
32
42
53
64
75
87
99
1012
1115
1220
1325
1433
1542
1654
1769
1889
19114
20146
21187
22240
23307
24394
25504
26646
27827
281060
291357
301739
312227
322853
333654
344680
355994
367677
379833
3812594
3916130
4020659
4126460
4233889
4343405
4455592
4571201
4691193
47116798
48149592

[0,1,1,2,2,3,4,5,7,9,12,15,20,25,33,42,54,69,89,
 114,146,187,240,307,394,504,646,827,1060,1357,
 1739,2227,2853,3654,4680,5994,7677,9833,12594,
 16130,20659,26460,33889,43405,55592,71201,91193,
 116798,149592]