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A307231 as a simple table

na(n)
01
11
21
32
43
56
614
731
874
9176
10425
111055
122637
136671
1416995
1543507
16112102
17290347
18755836
191976717
205189664
2113673314
2236139543
2395795807
24254610593
25678385919
261811625931
274848177910
2812999914523
2934921821516
3093971264941
31253272232362
32683646029385
331847935127768
345001703392561
3513554768152442
3636777239050602
3799896764310264
38271633640605450
39739353335433377
402014350935223715
415493039157088226
4214992221809540249

[1,1,1,2,3,6,14,31,74,176,425,1055,2637,6671,
 16995,43507,112102,290347,755836,1976717,5189664,
 13673314,36139543,95795807,254610593,678385919,
 1811625931,4848177910,12999914523,34921821516,
 93971264941,253272232362,683646029385,
 1847935127768,5001703392561,13554768152442,
 36777239050602,99896764310264,271633640605450,
 739353335433377,2014350935223715,5493039157088226,
 14992221809540249]