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A281850 as a simple table

na(n)
01
12
23
312
45
558
613
7246
827
9996
1033
114046
1291
1316292
14193
1565406
16387
17261688
18751
191047824
201607
214192444
222913
2316774542
246843
2567102020
268849
27268421422
2821595
291073720228
3054977
314294929790
32113283
3317179755896
34135887
3568719275312
36376375

[1,2,3,12,5,58,13,246,27,996,33,4046,91,16292,193,
 65406,387,261688,751,1047824,1607,4192444,2913,
 16774542,6843,67102020,8849,268421422,21595,
 1073720228,54977,4294929790,113283,17179755896,
 135887,68719275312,376375]