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A197098 as a simple table

na(n)
11
21
31
42
57
62
73
818
918
103
115
1255
1374
1455
155
168
17163
18384
19384
20163
218
2213
23484
241880
253477
261880
27484
2813
2921
301439
319274
3230071
3330071
349274
351439
3621
3734
384275
3945843
40259856
41457357
42259856
4345843
444275
4534
4655
4712704
48226260
492253537
506929744
516929744

[1,1,1,2,7,2,3,18,18,3,5,55,74,55,5,8,163,384,384,
 163,8,13,484,1880,3477,1880,484,13,21,1439,9274,
 30071,30071,9274,1439,21,34,4275,45843,259856,
 457357,259856,45843,4275,34,55,12704,226260,
 2253537,6929744,6929744]