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A125951 as a simple table

na(n)
11
21
32
42
54
65
710
815
926
1042
1174
12121
13212
14357
15620
161064
171856
183209
195618
209794
2117192
2230153
2353114
2493554
25165308
26292250
27517802
28918207
291630932
302899434
315161442
329196168
3316402764
3429281168
3552319364
3693555601
37167427844

[1,1,2,2,4,5,10,15,26,42,74,121,212,357,620,1064,
 1856,3209,5618,9794,17192,30153,53114,93554,
 165308,292250,517802,918207,1630932,2899434,
 5161442,9196168,16402764,29281168,52319364,
 93555601,167427844]