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A250308 as a simple table

na(n)
11
21
32
43
57
613
732
874
9192
10497
111379
123844
1311111
1432500
1596977
16292600
17894353
182758968
198590147
2026947946
2185138589
22270646644
23865260519
242780393959
258976443582
2629104709339
2794741504408
28309529405055
291014690513653
303336805406462
3111005284876792

[1,1,2,3,7,13,32,74,192,497,1379,3844,11111,32500,
 96977,292600,894353,2758968,8590147,26947946,
 85138589,270646644,865260519,2780393959,
 8976443582,29104709339,94741504408,309529405055,
 1014690513653,3336805406462,11005284876792]