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A180717 as a simple table

na(n)
01
11
23
310
437
5140
6544
72181
88873
936647
10152950
11644313
122734648
1311681428
1450173541
15216532005
16938383331
174081653710
1817811999929
1977957939080
20342099306436
211504801777973
226633574235109
2329300516237855

[1,1,3,10,37,140,544,2181,8873,36647,152950,
 644313,2734648,11681428,50173541,216532005,
 938383331,4081653710,17811999929,77957939080,
 342099306436,1504801777973,6633574235109,
 29300516237855]